#include <iostream>
using namespace std;

int main() {
    int N, M;
    cin >> N >> M;

    int K = 0;
    while ((K + 1) * (K + 1) / 2 <= min(N, M) && (K + 1) * (K + 1) - (K + 1) * (K + 1) / 2 <= max(N, M)) {
        K++;
    }

    cout << K << endl;
    return 0;
}