Poster

poster.cpp

#include <cstdio>
#include <string>

using namespace std;

string make(char x, int n){
	string s;
	for(int i=0;i<n;i++) s+=x;
	return s;
}

string solve(int n, int l){
	if(n==1) return string("J");
	else if(l <= n/2) return make('J',n/2)+make('O',n/2);
	else return make('I',n/2)+solve(n/2,l-n/2);
}

main(){
	int n,l;
	scanf("%d%d",&n,&l);
	printf("%s\n", solve(1<<n,l).c_str());
}