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51 lines (41 loc) · 868 Bytes
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C++STL.cpp.cpp
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51 lines (41 loc) · 868 Bytes
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#include<bits/stdc++.h>
#include<stdio.h>
#include<vector>
using namespace std ;
int main()
{
vector<int>arr;
int N,K,flag = 0;
while(cin>>N>>K)
{
flag = 0;
for(int i = 0; i< N ; i++)
{
int a ;
scanf("%d",&a);
arr.push_back(a);
}
for(int i = 0; i< N-1 ; i++)
{
for(int j = i ; j<N; j++)
{
if(i!=j)
{
if(arr[i]+arr[j]==K)
{
flag = 1;
break;
}
}
}
}
if(flag == 1)
{
cout<<"YES"<<endl;
}
else
cout<<"NO"<<endl;
arr.clear();
}
return 0;
}