Submission #1972698

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Source Code Expand

#include <algorithm>
#include <cmath>
#include <iostream>
#include <iomanip>
#include <map>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <list>
#define INF 10000000000ll
#define MOD 1000000007ll
#define EPS 1e-10
#define REP(i,m) for(long long i=0; i<m; i++)
#define FOR(i,n,m) for(long long i=n; i<m; i++)
#define DUMP(a) for(long long dump=0; dump<(ll)a.size(); dump++) { cout<<a[dump]; if(dump!=(ll)a.size()-1) cout<<" "; else cout<<endl; }
#define ALL(v) v.begin(),v.end()
#define pb push_back
using namespace std;
typedef long long int ll;
typedef pair<ll, ll> P;
typedef long double ld;
using namespace std;

int main(){
	int n, c;
	cin >> n >> c;
	int l[n];
	REP(i, n) cin >> l[i];
	sort(l, l+n);
	int end = n-1;
	int pair = 0;
	REP(i, n){
		while(l[i] + l[end] + 1 > c){if(end > 0){end--;}}
		if(i < end){pair++; end--;}
	}
	cout << n - pair << endl;
	return 0;
}

Submission Info

Judge Result