Compilare: main.cpp: In function 'int dijkstra(int, int)': main.cpp:59:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < G[x][d1].size() ; i ++) ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:88:34: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'bool*' [-Wformat=] scanf("%d" , &a[i][j]); ^ main.cpp:80:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("car.in" , "r" , stdin); ^ main.cpp:81:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("car.out" , "w" , stdout); ^ main.cpp:83:60: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d" , &n , &m , &xs , &ys , &xf , &yf); ^ main.cpp:88:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &a[i][j]); ^