Submission #1472213

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Source Code Expand

#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
typedef long long ll;

int main()
{
  int n, k;
  cin >> n >> k;
  FOR(i,1,n+1) {
    if(k == min(i, n - 2 * i)) {
      puts("YES");
      return 0;
    }
  }
  puts("NO");
  return 0;
}

Submission Info

Judge Result