为什么TLE？？？？？？？？？？

#include <iostream>
using namespace std;
int main(){
    int a[5],c=0;
    cin>>a[0]>>a[1]>>a[2]>>a[3]>>a[4];
    for(int i=0;i<5;i++){
        if(a[i]%3!=0){
            c+=a[i]%3;
            a[i]-=a[i]%3;
        }
        if(i=0){
            a[4]+=a[0]/3;
            a[1]+=a[0]/3;
        }
        else if(i==4){
            a[0]+=a[i]/3;
            a[3]+=a[i]/3;
        }
        else{
            a[i+1]+=a[i]/3;
            a[i-1]+=a[i]/3;
        }
    }
    for(int i=0;i<5;i++) cout<<a[i]<<' ';
    cout<<endl<<c;
    return 0;
}