Compilare: user.cpp: In function ‘int main()’: user.cpp:42:23: warning: left operand of comma operator has no effect [-Wunused-value] for(i=1,j=k;j>0;i,j){ ^ user.cpp:42:23: warning: right operand of comma operator has no effect [-Wunused-value] user.cpp:27:15: warning: unused variable ‘min’ [-Wunused-variable] int n, i, min=INT_MAX, k, a, b; ^ user.cpp:30:10: warning: unused variable ‘mf’ [-Wunused-variable] bool mf=true; ^ user.cpp:25:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kbetray.in", "r", stdin); ^ user.cpp:26:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kbetray.out", "w", stdout); ^ user.cpp:29:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &k); ^ user.cpp:33:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^