Compilare: main.cpp: In function 'bool bfs()': main.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<U[u].size(); i++){ ~^~~~~~~~~~~~ main.cpp: In function 'bool dfs(int)': main.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<U[nod].size(); i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("cuplaj.in", "r",stdin); ^ main.cpp:59:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.out", "w",stdout); ^ main.cpp:61:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &e); ^ main.cpp:63:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^