#include<bits/stdc++.h>
using namespace std;
char a,b[40001];
int n,x,t,ans_0,ans_1;
int main(){
	while(a=getchar()){
		b[++x]=a;
		if(b[x]=='\n'){
			x--;
			n=x;
			break;
		}
	}
	while(a=getchar()){
		b[++x]=a;
		if(b[x]=='\n') x--;
		if(x==n*n) break;
	}
	printf("%d ",n);
	int i=1;
	while(i<=n*n){
		if(b[i]=='0') ans_0++;
		else ans_1++;
		if(!t&&b[i]=='1'){
			printf("%d ",ans_0);
			ans_0=0;
			t=1;
		}else if(t&&b[i]=='0'){
			printf("%d ",ans_1);
			ans_1=0;
			t=0;
		}
		i++;
	}
	if(t) printf("%d ",ans_1);
	else printf("%d ",ans_0);
	return 0;
}
/*
输入：
0001000
0001000
0001111
0001000
0001000
0001000
1111111

本地输出：7 3 1 6 1 6 4 3 1 6 1 6 1 3 7
洛谷输出：8 3 1 6 2 6 6 3 1 6 2 6 2 3 17