Compilare: user.cpp: In function ‘int main()’: user.cpp:6:15: warning: left operand of comma operator has no effect [-Wunused-value] #define maxxx 999999999999999 ^ user.cpp:61:18: note: in expansion of macro ‘maxxx’ minn, pr=maxxx, ul=maxxx; ^ user.cpp:19:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("k1.in", "r", stdin); ^ user.cpp:20:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("k1.out", "w", stdout); ^ user.cpp:21:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:24:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &x); ^ user.cpp:60:15: warning: ‘minn’ may be used uninitialized in this function [-Wmaybe-uninitialized] x=minn; ^