like.. ami jokhon ee ekta new .cpp file create kori then..

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <cctype>
#include <cstdlib>
#include <fstream>
#include <vector>
#include <string>
#include <sstream>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <list>
#include <bitset>
#include <algorithm>
#include <functional>
using namespace std;

#define PI 2*acos(0.0)
#define FOR(i,n) for(int i = 0;i<n;++i)
#define setbit(a,b) a|=(1<<b)
#define S1(a) scanf("%d",&a)
#define S2(a,b) scanf("%d %d",&a,&b)
#define S3(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define C1(a) __builtin_popcount(a)
#define gcd(a,b) __gcd(a,b)
#define ALL(a) (a.begin(),a.end())

typedef long long LL;
typedef vector<string> vs;
typedef vector<int> vi;

int main(){

	return 0;

}