Compilare: user.cpp: In function ‘int dp(int, int, int)’: user.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[fin].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:42:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[0].size();i++) ^ user.cpp:26:37: 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:27:39: 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:28:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:34:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&C); ^