求助站外题!!!(违规紫衫)

#include<iostream>
using namespace std;
int num,sum,pp;
long long int a[100000][100000];
int main(){
	int n,x = 2,y = 2,cnt = 2;
	cin>>n>>num;
	a[1][1] = 1;
	int p = (1+n)*n/2;
	while(cnt <= p){
		while(y >= 1){
			a[x][y] = cnt;
			cnt++;
			y--;
		}
		y++,x++;
		while(y <= x){
			a[x][y] = cnt;
			cnt++,y++;
		}
		x++;
	}
	for(int i = 0;i <= n;i++){
		cin>>sum>>pp;
		cout<<a[sum][pp]<<endl;
	}
	return 0;
}

当 n = 6时的情况
1
3 2
4 5 6
10 9 8 7
11 12 13 14 15
21 20 19 18 17 16