rt,想问问

#include<cstdio>
using namespace std;
int n,l,r,k,max;
int main(){
	//freopen("candy.in","r",stdin);
	//freopen("candy.out","w",stdout);
	scanf("%d%d%d",&n,&l,&r);
	if(r-l>=n) {
		printf("%d",n-1);
		fclose(stdin);
	    fclose(stdout);
	    return 0;}
	else {
		for(int i=l;i<=r;i++){
			k=i-(i/n)*n;
			if(k==n-1) {
				printf("%d",k);
	    		fclose(stdin);
				fclose(stdout);
				return 0;
			}
			else if(k>max) max=k;}
		printf("%d",max);
	   // fclose(stdin);
		//fclose(stdout);
		return 0;
	}
}