Compilare: user.cpp: In function ‘int main()’: user.cpp:75:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<Minus.size();i++){ ^ user.cpp:77:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(index!=Plus.size()-1&&sum[FindDad(node)]==1&&SameComponent(node,Plus[index])==true){ ^ user.cpp:88:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<solution.size();i++) ^ user.cpp:35:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("turism.in","r",stdin); ^ user.cpp:36:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("turism.out","w",stdout); ^ user.cpp:38:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:42:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^