Compilare: user.cpp: In function ‘int main()’: user.cpp:72:61: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (i != Source[i][(1<<N)-1] && Cost[i][Source[i][(1<<N)-1]] > 0) { ^ user.cpp:73:65: warning: array subscript has type ‘char’ [-Wchar-subscripts] Sol = min(Sol, Best[i][(1<<N)-1] + Cost[i][Source[i][(1<<N)-1]]); ^ user.cpp:18:15: warning: unused variable ‘C’ [-Wunused-variable] int X, Y, Z, C; ^ user.cpp:20:34: 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:21:36: 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:23:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:25:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &X, &Y, &Z); ^