贪心

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Note  :
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#include <queue>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string.h>
#include <algorithm>
#define LL long long
#define IL inline
const int N = 1e6+10;
const int INF = 0x3f3f3f3f;
using namespace std;
IL int read()
{
    char ch = getchar();
    int f = 1, num = 0;
    while(ch>'9'||ch<'0')
    {
        if(ch=='-') f = -1;
        ch=getchar();
    }
    while(ch>='0'&&ch<='9')
        num = num*10+ch-'0', ch = getchar();
    return num*f;
}
string s;
int main()
{
	read(),cin>>s;
	int i=0;
	while(s[i]<=s[i+1]&&i+1<s.size())
        putchar(s[i++]);
    for(i=i+1;i<s.size();i++)
        putchar(s[i]);
}