Compilare: user.cpp: In function ‘int main()’: user.cpp:44:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( j = 0; j < v[ ordi[ i ] ].size(); ++j ){ ^ user.cpp:25:9: warning: unused variable ‘n’ [-Wunused-variable] int n, m, i, j, x, y, a, b, s; ^ user.cpp:22:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.in","r",stdin); ^ user.cpp:23:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.out","w",stdout); ^ user.cpp:28:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&a,&b,&m); ^ user.cpp:30:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^