Compilare: main.cpp: In function 'bool bfs(int, int)': main.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[u].size(); i++){ ~^~~~~~~~~~~~ main.cpp: In function 'void detflow(int)': main.cpp:43:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[n].size(); i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:84:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<g[i].size(); j++) ~^~~~~~~~~~~~ main.cpp:60:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("harta.in", "r", stdin); ^ main.cpp:61:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("harta.out", "w", stdout); ^ main.cpp:63:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:65:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &out[i], &in[i]); ^