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 'int main()': main.cpp:77:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[m+n+1].size(); i++){ ~^~~~~~~~~~~~~~~~ main.cpp:78:17: warning: unused variable 'v' [-Wunused-variable] int v=g[m+n+1][i].nod; ^ main.cpp:43:17: warning: unused variable 'y' [-Wunused-variable] int n,m,i,x,y,z,flu,maxflow=0,k,t,j,nr=-1; ^ main.cpp:43:19: warning: unused variable 'z' [-Wunused-variable] int n,m,i,x,y,z,flu,maxflow=0,k,t,j,nr=-1; ^ main.cpp:41:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("negot.in", "r",stdin); ^ main.cpp:42:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("negot.out", "w", stdout); ^ main.cpp:44:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &k); ^ main.cpp:46:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:48:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^