Compilare: user.cpp: In function ‘void Euclid(int)’: user.cpp:29:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); ++j) ^ user.cpp: In function ‘void solve()’: user.cpp:68:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < result.size(); ++i) ^ user.cpp: In function ‘void scan()’: user.cpp:17:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp: In function ‘int main()’: user.cpp:83:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biti.in", "r", stdin); ^ user.cpp:84:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biti.out", "w", stdout); ^