找规律

#include<bits/stdc++.h>
using namespace std;

int main(){
    int x=0,y=0;
    for(int i=1;i<=2020;i++){
        if(i%4==1) x+=i;
        if(i%4==2) y-=i;
        if(i%4==3) x-=i;
        if(i%4==0) y+=i;
    }
    cout<<x<<' '<<y<<endl;
}