开全局变量爆零，不开就ac，附上ac代码：（ps：wa的代码就是把那几个变量全部放在外面）

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



int main()
{
	ll n, k, l, r, res;
	cin.tie(0);
	cout.tie(0);
	ios::sync_with_stdio(false);
	cin >> n >>k;
	res = n * k;
	l = 1;
	for(l; l <= n; l = r + 1)
	{
		if(k/l == 0)break;
		r = min(k/(k/l),n);
		res -= (ll)(k/l)*(r - l + 1)*(r + l)/2;
	}
	cout << res << endl;
}