#include<iostream>
#include<functional>
using namespace std;
void test01(){
plus<int> p;
cout<<p(1,2)<<endl;
}
int main(){
test01();
return 0;
}
#include<iostream>
#include<functional>
using namespace std;
void test01(){
plus<int> p;
cout<<p(1,2)<<endl;
}
int main(){
test01();
return 0;
}
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