Compilare: user.cpp: In function ‘void solve()’: user.cpp:32:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( pz < v.size() ) ^ user.cpp:36:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pzc < v.size() && v[pz] == v[pzc]) ^ user.cpp: In function ‘void read()’: user.cpp:12:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:16:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp: In function ‘int main()’: user.cpp:60:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate6.in","r",stdin); ^ user.cpp:61:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrate6.out","w",stdout); ^