填空题
#include<iostream>
using _________ std;
int ____()
{
double _;
int y=15;
cin>>x;
bool f=true;
if(x*2!=y)
x*=y;
else
f=!f;
if(f)
cout<<"OK,it's done"<<endl;
return 0;
#include<iostream>
using _________ std;
int ____()
{
double _;
int y=15;
cin>>x;
bool f=true;
if(x*2!=y)
x*=y;
else
f=!f;
if(f)
cout<<"OK,it's done"<<endl;
return 0;
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