1

userId_undefined

张鸿瑞

倔强青铜

2024-08-08 11:23:42

发布于：四川

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#include <iostream>
using namespace std;
const int N = 200000 + 10;
int main() {
int n, c;
cin>>n>>c;

int a[N];
for (int i = 0; i < n; ++i) {
	cin>>a[i];
}

int ans = 0;
for (int i = 0; i < n; ++i) {
	for (int j = 0; j < n; ++j) {
		if (a[j] - a[i] == c) {
			ans++;
		}
	}
}

cout<<ans<<endl;
return 0;

}

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