#include<bits/stdc++.h> using namespace std; int main(){ int n,m; cin >> n >> m; int die[n + 1]={0}; int sr = 0; int ren = 0,bao = 0; while(sr != n-1){ ren++; if(ren > n){ ren = 1; } if(die[ren] == 0){ bao++; if(bao == m){ die[ren] = 1; bao = 0; sr++; } } } for(int i = 1;i <= n;i++){ if(die[i] ==0){ cout << i; return 0; } } return 0; }