Compilare: main.cpp: In function 'int main()': main.cpp:35:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[u.nod].size(); i++){ ~^~~~~~~~~~~~~~~~ main.cpp:14:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("evacuare.in", "r", stdin); ^ main.cpp:15:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("evacuare.out", "w", stdout); ^ main.cpp:17:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &exit); ^ main.cpp:19:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ main.cpp:24:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nextt[i]); ^