Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:16:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<veq[q].size();j++) ^ user.cpp:19:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int pa=j;pa<veq[q].size()-1;pa++) ^ user.cpp:36:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<vc[q].size();j++) ^ user.cpp:39:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int pa=j;pa<vc[q].size()-1;pa++) ^ user.cpp: In function ‘int main()’: user.cpp:72:9: warning: variable ‘kapachos’ set but not used [-Wunused-but-set-variable] int kapachos=0; ^ user.cpp:106:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<a[i].size()-1;j+=2) ^ user.cpp:58:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.in","r",stdin); ^ user.cpp:59:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.out","w",stdout); ^ user.cpp:60:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:62:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i].x); ^ user.cpp:64:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i].y); ^