Compilare: user.cpp: In function ‘int main()’: user.cpp:26:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[q[i]].size();j++) ^ user.cpp:36:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[q[i]].size();j++) ^ user.cpp:41:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[q[i]].size();j++) ^ user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hektor.in","r",stdin); ^ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hektor.out","w",stdout); ^ user.cpp:15:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&m,&A,&B); ^ user.cpp:16:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<=n;i++) scanf("%d",&cost[i]); ^ user.cpp:19:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^