Compilare: main.cpp: In function 'bool bfs()': main.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<adc[nod].size(); ++i) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:53:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=viz[nod];i<adc[nod].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:55:13: warning: unused variable 'u' [-Wunused-variable] int u = mch[adc[nod][i]].y; ^ main.cpp: In function 'int main()': main.cpp:87:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in","r",stdin); ^ main.cpp:88:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.out","w",stdout); ^ main.cpp:89:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:93:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^