Compilare: user.cpp: In function ‘int main()’: user.cpp:48:25: warning: suggest parentheses around ‘-’ inside ‘>>’ [-Wparentheses] mij=p+(u-p>>1); ^ user.cpp:59:21: warning: suggest parentheses around ‘-’ inside ‘>>’ [-Wparentheses] mij=p+(u-p>>1); ^ user.cpp:72:21: warning: suggest parentheses around ‘-’ inside ‘>>’ [-Wparentheses] mij=p+(u-p>>1); ^ user.cpp:26:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("marbles.in", "r", stdin); ^ user.cpp:27:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("marbles.out", "w", stdout); ^ user.cpp:28:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:30:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v[i].x, &v[i].c); ^ user.cpp:42:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &op, &x, &y); ^