Compilare: user.cpp: In function ‘int main()’: user.cpp:25:30: warning: too many arguments for format [-Wformat-extra-args] scanf("%d%d",&x,&y,&c); ^ user.cpp:40:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0 ; k < v[j].size(); ++k) ^ user.cpp:48:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t = 0; t < v[0].size(); ++t) ^ user.cpp:16:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hamilton.in","r",stdin); ^ user.cpp:17:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hamilton.out","w",stdout); ^ user.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:25:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y,&c); ^