Compilare: user.cpp: In function ‘void bfs(int, int, int)’: user.cpp:48:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(pi=0;pi<gr[pov].size();pi++) ^ user.cpp: In function ‘int main()’: user.cpp:105:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(x=0;x<gr[i].size();x++) ^ user.cpp:123:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<dp[p].size();i++) ^ user.cpp:90:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zmeu2.in","r",stdin); ^ user.cpp:91:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n",&n,&p,&k); ^ user.cpp:93:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&dur[i],&cap[i]); ^ user.cpp:96:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&x, &y); ^ user.cpp:117:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zmeu2.out","w",stdout); ^