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\newcommand{\titre}{Le car de ramassage}
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    \small Un car de ramassage doit s'arrêter à chaque carrefour d'un quartier, une fois et une seule. Selon le plan c'est possible ou non — et un simple coloriage permet souvent de le dire d'avance, sans essayer.
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\end{center}
\noindent \textbf{Le car part de l'école, au carrefour L, et doit s'arrêter à chaque carrefour exactement une fois.} Il emprunte les rues qu'il veut et n'a pas à toutes les parcourir.\par\addvspace{0.35em}
\begin{center}
\renewcommand{\arraystretch}{1.35}
\begin{tabular}{|c|c|c|c|}
\hline
\cellcolor{black!32}\bfseries Les rues & ⑩ rue du Pont & Ⓑ Place Sainte-Croix & Ⓛ Fontaine Notre-Dame \\ \hline
① allée des Tilleuls & ⑪ rue du Moulin & Ⓒ Rond-point du Stade & Ⓜ Place de l'Église \\ \hline
② rue du Four & ⑫ impasse du Vieux-Four & Ⓓ Carrefour du Lavoir & \cellcolor{black!32}\bfseries Les bâtiments \\ \hline
③ rue des Lilas & ⑬ chemin de Ronde & Ⓔ Rond-point des Vaches & \textbf{a} l'école \\ \hline
④ passage du Marché & ⑭ rue Pasteur & Ⓕ Place des Tanneurs & \textbf{b} le lavoir \\ \hline
⑤ chemin des Vignes & ⑮ rue Verte & Ⓖ Carrefour des Tilleuls & \textbf{c} la bibliothèque \\ \hline
⑥ impasse Verte & ⑯ rue Basse & Ⓗ Coin du Lavoir & \textbf{d} le gymnase \\ \hline
⑦ allée des Peupliers & ⑰ boulevard du Parc & Ⓘ Carrefour de l'Hôpital &  \\ \hline
⑧ chemin du Lavoir & \cellcolor{black!32}\bfseries Les carrefours & Ⓙ Placette des Ormes &  \\ \hline
⑨ rue du Stade & Ⓐ Place aux Herbes & Ⓚ Carrefour de la Mairie &  \\ \hline
\end{tabular}
\end{center}
\noindent{\small\itshape Légende du plan}\par\addvspace{0.4em}
\begin{enumerate}
  \item Colorier les carrefours du plan avec \textbf{deux couleurs}, de sorte que deux carrefours \textbf{reliés par une rue} ne soient jamais de la même couleur. Combien y en a-t-il de chaque couleur ?
  \item Le car roule d'un carrefour au suivant. Que peut-on dire de la \textbf{couleur} des arrêts successifs ? Qu'en déduire sur les couleurs des arrêts d'une tournée qui les dessert tous ?
  \item \textbf{Le car peut-il desservir tous les carrefours, une fois chacun, et revenir à l'école ?} Si oui, décrire un trajet ; sinon, démontrer que c'est impossible.
  \item \textbf{Et s'il n'est pas obligé de revenir à l'école ?} Même consigne.
\end{enumerate}
\newpage
\section*{\textcolor{red}{Correction}}
\needspace{5\baselineskip}
\subsection*{\textcolor{red}{Le car de ramassage — Correction}}
\needspace{3\baselineskip}
\begin{center}
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\draw[line width=0.5pt] (7.797,5.396) -- (7.764,5.169) -- (7.736,4.94) -- (7.715,4.712) -- (7.698,4.483) -- (7.687,4.253) -- (7.681,4.023) -- (7.681,3.793) -- (7.686,3.564) -- (7.696,3.334) -- (7.712,3.105) -- (7.733,2.876) -- (7.76,2.648) -- (7.791,2.42) -- (7.829,2.194);
\draw[line width=0.5pt] (1.335,5.109) -- (1.532,5.126) -- (1.73,5.139) -- (1.928,5.148) -- (2.126,5.152) -- (2.325,5.151) -- (2.523,5.145) -- (2.721,5.135) -- (2.919,5.12) -- (3.116,5.101) -- (3.313,5.076) -- (3.509,5.048) -- (3.705,5.014) -- (3.899,4.976) -- (4.093,4.934);
\draw[line width=0.5pt] (4.093,4.934) -- (4.36,4.926) -- (4.628,4.924) -- (4.896,4.929) -- (5.163,4.941) -- (5.431,4.958) -- (5.698,4.982) -- (5.964,5.012) -- (6.229,5.048) -- (6.494,5.091) -- (6.757,5.139) -- (7.019,5.194) -- (7.28,5.255) -- (7.539,5.322) -- (7.797,5.396);
\draw[line width=0.5pt] (4.093,4.934) -- (4.152,4.698) -- (4.207,4.46) -- (4.255,4.222) -- (4.298,3.982) -- (4.335,3.741) -- (4.366,3.5) -- (4.392,3.257) -- (4.412,3.015) -- (4.427,2.771) -- (4.435,2.528) -- (4.438,2.285) -- (4.435,2.041) -- (4.427,1.798) -- (4.413,1.555);
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\filldraw[fill=white, draw=black, line width=0.5pt] (1.85,11.555) -- (1.822,11.698) -- (1.741,11.819) -- (1.62,11.9) -- (1.477,11.928) -- (1.334,11.9) -- (1.213,11.819) -- (1.132,11.698) -- (1.104,11.555) -- (1.132,11.412) -- (1.213,11.291) -- (1.334,11.21) -- (1.477,11.182) -- (1.62,11.21) -- (1.741,11.291) -- (1.822,11.412) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (7.675,10.972) -- (7.647,11.115) -- (7.566,11.236) -- (7.445,11.317) -- (7.302,11.345) -- (7.159,11.317) -- (7.038,11.236) -- (6.957,11.115) -- (6.929,10.972) -- (6.957,10.829) -- (7.038,10.708) -- (7.159,10.627) -- (7.302,10.599) -- (7.445,10.627) -- (7.566,10.708) -- (7.647,10.829) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (5.123,10.86) -- (5.095,11.003) -- (5.014,11.124) -- (4.893,11.205) -- (4.75,11.233) -- (4.607,11.205) -- (4.486,11.124) -- (4.405,11.003) -- (4.376,10.86) -- (4.405,10.717) -- (4.486,10.596) -- (4.607,10.515) -- (4.75,10.487) -- (4.893,10.515) -- (5.014,10.596) -- (5.095,10.717) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (7.915,8.332) -- (7.887,8.475) -- (7.806,8.596) -- (7.685,8.677) -- (7.542,8.706) -- (7.399,8.677) -- (7.278,8.596) -- (7.197,8.475) -- (7.169,8.332) -- (7.197,8.19) -- (7.278,8.069) -- (7.399,7.988) -- (7.542,7.959) -- (7.685,7.988) -- (7.806,8.069) -- (7.887,8.19) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (1.841,8.086) -- (1.813,8.229) -- (1.732,8.35) -- (1.611,8.431) -- (1.468,8.459) -- (1.325,8.431) -- (1.204,8.35) -- (1.123,8.229) -- (1.095,8.086) -- (1.123,7.943) -- (1.204,7.822) -- (1.325,7.741) -- (1.468,7.713) -- (1.611,7.741) -- (1.732,7.822) -- (1.813,7.943) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (11.178,7.89) -- (11.15,8.033) -- (11.069,8.154) -- (10.948,8.235) -- (10.805,8.264) -- (10.662,8.235) -- (10.541,8.154) -- (10.46,8.033) -- (10.432,7.89) -- (10.46,7.748) -- (10.541,7.626) -- (10.662,7.546) -- (10.805,7.517) -- (10.948,7.546) -- (11.069,7.626) -- (11.15,7.748) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (4.428,7.791) -- (4.4,7.934) -- (4.319,8.055) -- (4.198,8.136) -- (4.055,8.164) -- (3.912,8.136) -- (3.791,8.055) -- (3.71,7.934) -- (3.682,7.791) -- (3.71,7.648) -- (3.791,7.527) -- (3.912,7.446) -- (4.055,7.418) -- (4.198,7.446) -- (4.319,7.527) -- (4.4,7.648) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (10.664,5.603) -- (10.636,5.746) -- (10.555,5.867) -- (10.434,5.948) -- (10.291,5.977) -- (10.148,5.948) -- (10.027,5.867) -- (9.946,5.746) -- (9.918,5.603) -- (9.946,5.461) -- (10.027,5.34) -- (10.148,5.259) -- (10.291,5.23) -- (10.434,5.259) -- (10.555,5.34) -- (10.636,5.461) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (8.17,5.396) -- (8.141,5.539) -- (8.06,5.66) -- (7.939,5.741) -- (7.797,5.769) -- (7.654,5.741) -- (7.533,5.66) -- (7.452,5.539) -- (7.423,5.396) -- (7.452,5.253) -- (7.533,5.132) -- (7.654,5.051) -- (7.797,5.023) -- (7.939,5.051) -- (8.06,5.132) -- (8.141,5.253) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (1.708,5.109) -- (1.68,5.251) -- (1.599,5.372) -- (1.478,5.453) -- (1.335,5.482) -- (1.192,5.453) -- (1.071,5.372) -- (0.99,5.251) -- (0.962,5.109) -- (0.99,4.966) -- (1.071,4.845) -- (1.192,4.764) -- (1.335,4.735) -- (1.478,4.764) -- (1.599,4.845) -- (1.68,4.966) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (4.466,4.934) -- (4.438,5.077) -- (4.357,5.198) -- (4.236,5.279) -- (4.093,5.307) -- (3.95,5.279) -- (3.829,5.198) -- (3.748,5.077) -- (3.72,4.934) -- (3.748,4.791) -- (3.829,4.67) -- (3.95,4.589) -- (4.093,4.561) -- (4.236,4.589) -- (4.357,4.67) -- (4.438,4.791) -- cycle;
\filldraw[fill=black!38, draw=black, line width=0.5pt] (8.202,2.194) -- (8.174,2.337) -- (8.093,2.458) -- (7.972,2.539) -- (7.829,2.567) -- (7.686,2.539) -- (7.565,2.458) -- (7.484,2.337) -- (7.456,2.194) -- (7.484,2.051) -- (7.565,1.93) -- (7.686,1.849) -- (7.829,1.821) -- (7.972,1.849) -- (8.093,1.93) -- (8.174,2.051) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (4.786,1.555) -- (4.757,1.698) -- (4.676,1.819) -- (4.555,1.9) -- (4.413,1.928) -- (4.27,1.9) -- (4.149,1.819) -- (4.068,1.698) -- (4.039,1.555) -- (4.068,1.412) -- (4.149,1.291) -- (4.27,1.21) -- (4.413,1.182) -- (4.555,1.21) -- (4.676,1.291) -- (4.757,1.412) -- cycle;
\filldraw[fill=white, draw=black, line width=0.5pt] (3.164,11.064) -- (3.283,11.083) -- (3.39,11.138) -- (3.476,11.223) -- (3.53,11.33) -- (3.549,11.449) -- (3.53,11.567) -- (3.476,11.675) -- (3.39,11.76) -- (3.283,11.814) -- (3.164,11.833) -- (3.164,11.833) -- (3.046,11.814) -- (2.938,11.76) -- (2.853,11.675) -- (2.799,11.567) -- (2.78,11.449) -- (2.799,11.33) -- (2.853,11.223) -- (2.938,11.138) -- (3.046,11.083) -- (3.164,11.064) -- cycle;
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\filldraw[fill=white, draw=black, line width=0.5pt] (2.0,9.435) -- (2.119,9.453) -- (2.226,9.508) -- (2.311,9.593) -- (2.366,9.7) -- (2.385,9.819) -- (2.366,9.938) -- (2.311,10.045) -- (2.226,10.13) -- (2.119,10.185) -- (2.0,10.204) -- (2.0,10.204) -- (1.881,10.185) -- (1.774,10.13) -- (1.689,10.045) -- (1.634,9.938) -- (1.616,9.819) -- (1.634,9.7) -- (1.689,9.593) -- (1.774,9.508) -- (1.881,9.453) -- (2.0,9.435) -- cycle;
\node at (2.0,9.819) {\scalebox{1.548}{\small 2}};
\filldraw[fill=white, draw=black, line width=0.5pt] (7.696,9.293) -- (7.815,9.311) -- (7.922,9.366) -- (8.007,9.451) -- (8.062,9.558) -- (8.081,9.677) -- (8.062,9.796) -- (8.007,9.903) -- (7.922,9.988) -- (7.815,10.043) -- (7.696,10.062) -- (7.696,10.062) -- (7.577,10.043) -- (7.47,9.988) -- (7.385,9.903) -- (7.331,9.796) -- (7.312,9.677) -- (7.331,9.558) -- (7.385,9.451) -- (7.47,9.366) -- (7.577,9.311) -- (7.696,9.293) -- cycle;
\node at (7.696,9.677) {\scalebox{1.548}{\small 3}};
\filldraw[fill=white, draw=black, line width=0.5pt] (6.005,11.021) -- (6.123,11.04) -- (6.231,11.095) -- (6.316,11.18) -- (6.37,11.287) -- (6.389,11.406) -- (6.37,11.524) -- (6.316,11.632) -- (6.231,11.717) -- (6.123,11.771) -- (6.005,11.79) -- (6.005,11.79) -- (5.886,11.771) -- (5.779,11.717) -- (5.693,11.632) -- (5.639,11.524) -- (5.62,11.406) -- (5.639,11.287) -- (5.693,11.18) -- (5.779,11.095) -- (5.886,11.04) -- (6.005,11.021) -- cycle;
\node at (6.005,11.406) {\scalebox{1.548}{\small 4}};
\filldraw[fill=white, draw=black, line width=0.5pt] (4.651,8.885) -- (4.77,8.904) -- (4.877,8.958) -- (4.962,9.043) -- (5.016,9.151) -- (5.035,9.269) -- (5.016,9.388) -- (4.962,9.495) -- (4.877,9.58) -- (4.77,9.635) -- (4.651,9.654) -- (4.651,9.654) -- (4.532,9.635) -- (4.425,9.58) -- (4.34,9.495) -- (4.285,9.388) -- (4.266,9.269) -- (4.285,9.151) -- (4.34,9.043) -- (4.425,8.958) -- (4.532,8.904) -- (4.651,8.885) -- cycle;
\node at (4.651,9.269) {\scalebox{1.548}{\small 5}};
\filldraw[fill=white, draw=black, line width=0.5pt] (9.243,8.242) -- (9.362,8.261) -- (9.469,8.316) -- (9.555,8.401) -- (9.609,8.508) -- (9.628,8.627) -- (9.609,8.746) -- (9.555,8.853) -- (9.469,8.938) -- (9.362,8.993) -- (9.243,9.012) -- (9.243,9.012) -- (9.125,8.993) -- (9.017,8.938) -- (8.932,8.853) -- (8.878,8.746) -- (8.859,8.627) -- (8.878,8.508) -- (8.932,8.401) -- (9.017,8.316) -- (9.125,8.261) -- (9.243,8.242) -- cycle;
\node at (9.243,8.627) {\scalebox{1.548}{\small 6}};
\filldraw[fill=white, draw=black, line width=0.5pt] (7.931,6.502) -- (8.05,6.521) -- (8.157,6.576) -- (8.242,6.661) -- (8.297,6.768) -- (8.316,6.887) -- (8.297,7.006) -- (8.242,7.113) -- (8.157,7.198) -- (8.05,7.252) -- (7.931,7.271) -- (7.931,7.271) -- (7.813,7.252) -- (7.705,7.198) -- (7.62,7.113) -- (7.566,7.006) -- (7.547,6.887) -- (7.566,6.768) -- (7.62,6.661) -- (7.705,6.576) -- (7.813,6.521) -- (7.931,6.502) -- cycle;
\node at (7.931,6.887) {\scalebox{1.548}{\small 7}};
\filldraw[fill=white, draw=black, line width=0.5pt] (2.73,7.279) -- (2.849,7.297) -- (2.956,7.352) -- (3.041,7.437) -- (3.096,7.544) -- (3.115,7.663) -- (3.096,7.782) -- (3.041,7.889) -- (2.956,7.974) -- (2.849,8.029) -- (2.73,8.048) -- (2.73,8.048) -- (2.611,8.029) -- (2.504,7.974) -- (2.419,7.889) -- (2.364,7.782) -- (2.346,7.663) -- (2.364,7.544) -- (2.419,7.437) -- (2.504,7.352) -- (2.611,7.297) -- (2.73,7.279) -- cycle;
\node at (2.73,7.663) {\scalebox{1.548}{\small 8}};
\filldraw[fill=white, draw=black, line width=0.5pt] (1.663,6.201) -- (1.782,6.22) -- (1.889,6.274) -- (1.974,6.36) -- (2.029,6.467) -- (2.047,6.586) -- (2.029,6.704) -- (1.974,6.812) -- (1.889,6.897) -- (1.782,6.951) -- (1.663,6.97) -- (1.663,6.97) -- (1.544,6.951) -- (1.437,6.897) -- (1.352,6.812) -- (1.297,6.704) -- (1.278,6.586) -- (1.297,6.467) -- (1.352,6.36) -- (1.437,6.274) -- (1.544,6.22) -- (1.663,6.201) -- cycle;
\node at (1.663,6.586) {\scalebox{1.548}{\small 9}};
\filldraw[fill=white, draw=black, line width=0.5pt] (5.898,8.201) -- (6.017,8.22) -- (6.124,8.274) -- (6.209,8.36) -- (6.264,8.467) -- (6.283,8.586) -- (6.264,8.704) -- (6.209,8.812) -- (6.124,8.897) -- (6.017,8.951) -- (5.898,8.97) -- (5.536,8.97) -- (5.417,8.951) -- (5.31,8.897) -- (5.225,8.812) -- (5.171,8.704) -- (5.152,8.586) -- (5.171,8.467) -- (5.225,8.36) -- (5.31,8.274) -- (5.417,8.22) -- (5.536,8.201) -- cycle;
\node at (5.717,8.586) {\scalebox{1.548}{\small 10}};
\filldraw[fill=white, draw=black, line width=0.5pt] (4.521,5.981) -- (4.64,6.0) -- (4.747,6.055) -- (4.833,6.14) -- (4.887,6.247) -- (4.906,6.366) -- (4.887,6.485) -- (4.833,6.592) -- (4.747,6.677) -- (4.64,6.732) -- (4.521,6.75) -- (4.16,6.75) -- (4.041,6.732) -- (3.934,6.677) -- (3.848,6.592) -- (3.794,6.485) -- (3.775,6.366) -- (3.794,6.247) -- (3.848,6.14) -- (3.934,6.055) -- (4.041,6.0) -- (4.16,5.981) -- cycle;
\node at (4.34,6.366) {\scalebox{1.548}{\small 11}};
\filldraw[fill=white, draw=black, line width=0.5pt] (9.184,5.601) -- (9.303,5.62) -- (9.41,5.675) -- (9.495,5.76) -- (9.55,5.867) -- (9.569,5.986) -- (9.55,6.104) -- (9.495,6.212) -- (9.41,6.297) -- (9.303,6.351) -- (9.184,6.37) -- (8.822,6.37) -- (8.704,6.351) -- (8.596,6.297) -- (8.511,6.212) -- (8.457,6.104) -- (8.438,5.986) -- (8.457,5.867) -- (8.511,5.76) -- (8.596,5.675) -- (8.704,5.62) -- (8.822,5.601) -- cycle;
\node at (9.003,5.986) {\scalebox{1.548}{\small 12}};
\filldraw[fill=white, draw=black, line width=0.5pt] (7.477,3.405) -- (7.596,3.424) -- (7.703,3.478) -- (7.788,3.564) -- (7.843,3.671) -- (7.862,3.79) -- (7.843,3.908) -- (7.788,4.016) -- (7.703,4.101) -- (7.596,4.155) -- (7.477,4.174) -- (7.115,4.174) -- (6.996,4.155) -- (6.889,4.101) -- (6.804,4.016) -- (6.749,3.908) -- (6.731,3.79) -- (6.749,3.671) -- (6.804,3.564) -- (6.889,3.478) -- (6.996,3.424) -- (7.115,3.405) -- cycle;
\node at (7.296,3.79) {\scalebox{1.548}{\small 13}};
\filldraw[fill=white, draw=black, line width=0.5pt] (2.926,5.134) -- (3.045,5.153) -- (3.152,5.208) -- (3.238,5.293) -- (3.292,5.4) -- (3.311,5.519) -- (3.292,5.637) -- (3.238,5.745) -- (3.152,5.83) -- (3.045,5.884) -- (2.926,5.903) -- (2.565,5.903) -- (2.446,5.884) -- (2.339,5.83) -- (2.253,5.745) -- (2.199,5.637) -- (2.18,5.519) -- (2.199,5.4) -- (2.253,5.293) -- (2.339,5.208) -- (2.446,5.153) -- (2.565,5.134) -- cycle;
\node at (2.745,5.519) {\scalebox{1.548}{\small 14}};
\filldraw[fill=white, draw=black, line width=0.5pt] (6.097,5.009) -- (6.216,5.028) -- (6.323,5.082) -- (6.408,5.168) -- (6.463,5.275) -- (6.482,5.394) -- (6.463,5.512) -- (6.408,5.62) -- (6.323,5.705) -- (6.216,5.759) -- (6.097,5.778) -- (5.735,5.778) -- (5.616,5.759) -- (5.509,5.705) -- (5.424,5.62) -- (5.37,5.512) -- (5.351,5.394) -- (5.37,5.275) -- (5.424,5.168) -- (5.509,5.082) -- (5.616,5.028) -- (5.735,5.009) -- cycle;
\node at (5.916,5.394) {\scalebox{1.548}{\small 15}};
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\noindent{\small\itshape Deux carrefours reliés par une rue n'ont jamais la même couleur.}\par\addvspace{0.4em}
\noindent \textbf{1.} Le coloriage est \textbf{forcé} : une fois la couleur d'un carrefour choisie, celle de tous les autres suit, de proche en proche.\par\addvspace{0.35em}
\begin{center}
\renewcommand{\arraystretch}{1.35}
\begin{tabular}{|c|c|c|}
\hline
\cellcolor{blue!7}\bfseries Couleur & \cellcolor{blue!7}\bfseries Carrefours & \cellcolor{blue!7}\bfseries Nombre \\ \hline
sombres & C, D, E, H, K, L & 6 \\ \hline
clairs & A, B, F, G, I, J, M & 7 \\ \hline
\end{tabular}
\end{center}
\noindent{\color{red!80!black}\bfseries Il y a \textbf{6} carrefours sombres et \textbf{7} clairs. Il y en a donc \textbf{1 de plus} du côté des clairs.}\par\addvspace{0.4em}
\noindent \textbf{2.}\par\addvspace{0.35em}
\noindent{\color{green!45!black}\textbf{Le raisonnement clé.} Chaque rue relie un carrefour sombre à un carrefour clair. Donc à chaque fois que le car roule, il \textbf{change de couleur} : ses arrêts sont sombre, clair, sombre, clair\dots{} \textbf{en alternance}.}\par\addvspace{0.4em}
\noindent{\color{red!80!black}\bfseries Une tournée qui dessert les 13 carrefours alterne donc les deux couleurs d'un bout à l'autre : elle en utilise \textbf{autant de chaque, à un près}. Et si elle en utilise un de plus d'une couleur, c'est forcément celle de son \textbf{départ} et de son \textbf{arrivée}.}\par\addvspace{0.4em}
\noindent \textbf{3.}\par\addvspace{0.35em}
\noindent{\color{red!80!black}\bfseries \textbf{Non.} Un circuit revient à son point de départ : il compte autant d'arrêts sombres que de clairs. Or ce quartier a 6 carrefours sombres et 7 clairs — c'est impossible.}\par\addvspace{0.4em}
\noindent \textbf{4.}\par\addvspace{0.35em}
\noindent{\color{red!80!black}\bfseries \textbf{Non plus.} Avec un carrefour clair de plus, la tournée doit \textbf{partir et arriver} sur un carrefour clair. Or l'école est en \textbf{L}, qui est sombre.}\par\addvspace{0.4em}
\noindent{\color{green!45!black}Une tournée existe pourtant dans ce quartier : il suffirait d'installer l'école sur un carrefour clair. Ce n'est pas le plan qui est en cause, c'est l'endroit d'où l'on part.}\par\addvspace{0.4em}
\end{document}
