#include<bits/stdc++.h> using namespace std; int n,m; int hz[1000]; int main() { cin>>n>>m; int ren=0; int bs=0; int live=n; while(live!=1) { ren++; if(ren==n+1) { ren=1; } if(hz[ren]==1) { continue; } bs++; if(bs==m){ hz[ren]=1; bs=0; live--; } } cout<<bs; return 0; }