#include<bits/stdc++.h> using namespace std; int main() { int n; int 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; }