提出 #73366927

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ソースコード 拡げる

#include <bits/stdc++.h>
using namespace std;

#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define INF 1001001001
#define INFF 1001001001001001001
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using i128 = __int128_t;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vs = vector<string>;
using vvs = vector<vs>;
using vc = vector<char>;
using vvc = vector<vc>;
using vb = vector<bool>;
using vvb = vector<vb>;
using vd = vector<double>;
using vvd = vector<vd>;
template <typename T> inline bool chmin(T &a,T b){if(a>b){a=b;return true;} return false;}
template <typename T> inline bool chmax(T &a,T b){if(a<b){a=b;return true;} return false;}

// #include <atcoder/all>
// using namespace atcoder;


int main()
{
	cin.tie(nullptr);
	ios_base::sync_with_stdio(false);

	int n, l, w;
	cin >> n >> l >> w;
	vi d(n);
	int cnt = 0;
	for (int i = 0; i < n; i++)
	{
		cin >> d[i];
		if (d[i] >= l - w && d[i] <= l + w)
		{
			cnt++;
		}
	}

	cout << cnt << endl;
	return (0);
}

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