Compilare: user.cpp: In function ‘void solve()’: user.cpp:80:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (grad [i] == 1) ^ user.cpp: In function ‘void read()’: user.cpp:24:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:28:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &d); ^ user.cpp: In function ‘int main()’: user.cpp:91:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("copsamica.in", "r", stdin); ^ user.cpp:92:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("copsamica.out", "w", stdout); ^ user.cpp:94:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &T); ^