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#include<stdio.h>
int main() {
	int n,a,b;
	while(scanf("%d %d %d",&n,&a,&b)!=EOF) {
		if(b==0)
			printf("%d\n",a);
		else {
			b%=n;
			if(b>0) {
				if(a+b==n)
					printf("%d\n",n);
				else
					printf("%d\n",(a+b)%n);
			} else {
				if(a+b>0)
					printf("%d\n",a+b);
				else
					printf("%d\n",n+a+b);
			}
		}
	}
	return 0;
}