#include <iostream>
using namespace std;

int main() {
int M;

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#include <iostream>
#include <vector>
#include <queue>
using namespace std;
const int maxn = 100005;

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#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int dp[30005][3];

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

#include <iostream>
using namespace std;


class Student {

#include <iostream>
#include <vector>
#include <stack>
#include <cstring>
using namespace std;

#include <iostream>
#include<stack>
using namespace std;

int main()