#include <bits/stdc++.h> using namespace std; vector <int> v; int main() { int n, m; cin >> n >> m; for (int i = 1; i <= n; i++) v.push_back(i); int nowstart = 0; while (v.size() != 1) { for (int i = nowstart; i < m; i++) nowstart = i; v.erase(v.begin() + nowstart - 1); } cout << v[0] << endl; return 0; }