#include <iostream>
using namespace std;
int main()
{
	//freopen("input.txt","r",stdin);
	int n,k,m,x;
	while(scanf("%d %d %d",&n,&k,&m)&&n)
	{
		x=0;
		for(int i=2;i<=n;++i)
			x=(x+k%i)%i;
		x+=(m-k);
		x%=n;
		if(x<0)
			x+=n;
		printf("%d\n",x+1);
	}
	return 0;
}