Compilare: user.cpp: In function ‘int brut()’: user.cpp:35:13: warning: unused variable ‘invp’ [-Wunused-variable] int invp=rid_put(v[i].p,mod-2),invq=rid_put(v[i].q,mod-2); ^ user.cpp: In function ‘int main()’: user.cpp:57:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("diapazon.in", "r", stdin); ^ user.cpp:58:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("diapazon.out", "w", stdout); ^ user.cpp:59:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:60:76: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<=n;i++) scanf("%d%d%d%d",&v[i].x,&v[i].y,&v[i].p,&v[i].q); ^