wurenchao 2023-10-04 14:42:27 2023-10-04 15:08:20 10 返回题目
#include<bits/stdc++.h>
using namespace std;
int l=0,a[10000001];
int main(){
while(cin>>a[l]&&a[l]) ++l; if(l%2) cout<<a[l/2]; else cout<<a[l/2]+a[l/2-1]; return 0;
}
