#include<bits/stdc++.h> using namespace std; int main(){ int n,m; cin >> n >> m; queue<int> live; for(int i = 1;i <= n;i++){ live.push(i); } int bs = 0; while(live.size()!=1){ int ren = live.front(); live.pop(); bs++; if(bs == m){ bs=0; }else{ live.push(ren); } } cout<<live.front(); live.pop(); return 0; }