代码

#include<bits/stdc++.h>
#pragma GCC optimize(2,3,"Ofast","inline")
using namespace std;
int o;
inline void f(int x){o+=x;}
int main(){
	int a=1,b=2,i;
	for(i=1;i<1000000000;++i)a+=b,f(a),f(b),f(a),f(b),b+=a;
	cout<<o<<'\n';
	return 0;
}

评测结果