OJ Board

Hi, can anyone please help me with this code. I have checked everything but still wrong answer!
#include <bits/stdc++.h>

using namespace std;

#define PB push_back
#define PF push_front
#define V vector
#define PII pair <int,int>
#define MII map <int,int>
#define MSI map <string,int>
#define MIS ...

Hi, can anyone please help me with this code. I have checked everything but still wrong answer!
#include <bits/stdc++.h>

using namespace std;

#define PB push_back
#define PF push_front
#define V vector
#define PII pair <int,int>
#define MII map <int,int>
#define MSI map <string,int>
#define MIS ...