[Codeforces Round495B] Sonya and Exhibition

[题目链接]

https://codeforces.com/contest/1004/problem/B

[算法]

不难发现 ， 最优解一定是01010101....

时间复杂度 : O(N)

[代码]

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

template <typename T> inline void read(T &x)
{
    T f = ; x = ;
    char c = getchar();
    for (; !isdigit(c); c = getchar()) if (c == '-') f = -f;
    for (; isdigit(c); c = getchar()) x = (x << ) + (x << ) + c - '';
    x *= f;
}

int main()
{

        int n,m;
        read(n); read(m);
        for (int i = ; i <= m; i++)
        {
                int a,b;
                read(a); read(b);
        }
        for (int i = ; i <= n; i++) printf("%d",(i % ) ?  : );
        printf("\n");

        return ;

}