Compilare: main.cpp: In function 'short int dijkstra(short int, short int)': main.cpp:60:23: 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:89:35: warning: format '%hd' expects argument of type 'short int*', but argument 2 has type 'bool*' [-Wformat=] scanf("%hd" , &a[i][j]); ^ main.cpp:81:36: 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:82:38: 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:84:66: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%hd%hd%hd%hd%hd%hd" , &n , &m , &xs , &ys , &xf , &yf); ^ main.cpp:89:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%hd" , &a[i][j]); ^