Compilare: main.cpp: In function 'bool bfs()': main.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<adc[nod].size(); ++i) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'bool dfs(int, int)': main.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; viz[nod]<adc[nod].size(); ++viz[nod]) ~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp: In function 'long long int flux(int, int)': main.cpp:86:25: warning: unused variable 'ret' [-Wunused-variable] while(long long ret=dfs(st,lim)) ^~~ main.cpp: In function 'int main()': main.cpp:93:36: 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:94:39: 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:95:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:99:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^