CodeForces 616B Dinner with Emma

题意：给你n行m列，A负责选行，B负责选列，A先选，A希望选择出来的数尽量大，B希望选择出来的数尽量小，问最后答案应该是多少

思路： 输出比较每一行的最小值， 然后输出最大的就好了 因为A先选，所以肯定会选择某一行中，最小值最大的那个

B肯定选择这一行的最小值

#include<bits/stdc++.h>
using namespace std;

int ans = 0;
int main()
{
    int n,m;
	scanf("%d%d",&n,&m);
	for (int i = 0;i<n;i++)
	{
		int res = 1e9;
		for (int j = 0;j<m;j++)
		{
			int x;
			scanf("%d",&x);
            res = min(x,res);
		}
		ans = max(res,ans);
	}
	printf("%d\n",ans);
}

Description

Jack decides to invite Emma out for a dinner. Jack is a modest student, he doesn't want to go to an expensive restaurant. Emma is a girl with high taste, she prefers elite places.

Munhattan consists of n streets and m avenues. There is exactly one restaurant on the intersection of each street and avenue. The streets are numbered with integers from 1 to n and the avenues are numbered with integers from 1 to m. The cost of dinner in the restaurant at the intersection of the i-th street and the j-th avenue is c_ij.

Jack and Emma decide to choose the restaurant in the following way. Firstly Emma chooses the street to dinner and then Jack chooses the avenue. Emma and Jack makes their choice optimally: Emma wants to maximize the cost of the dinner, Jack wants to minimize it. Emma takes into account that Jack wants to minimize the cost of the dinner. Find the cost of the dinner for the couple in love.

Input

The first line contains two integers n, m (1 ≤ n, m ≤ 100) — the number of streets and avenues in Munhattan.

Each of the next n lines contains m integers c_ij (1 ≤ c_ij ≤ 10⁹) — the cost of the dinner in the restaurant on the intersection of the i-th street and the j-th avenue.

Output

Print the only integer a — the cost of the dinner for Jack and Emma.

Sample Input

Input

3 4
4 1 3 5
2 2 2 2
5 4 5 1

Output

2

Input

3 3
1 2 3
2 3 1
3 1 2

Output

1

Hint

In the first example if Emma chooses the first or the third streets Jack can choose an avenue with the cost of the dinner 1. So she chooses the second street and Jack chooses any avenue. The cost of the dinner is 2.

In the second example regardless of Emma's choice Jack can choose a restaurant with the cost of the dinner 1.