#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
int main(){
int b, n, d, m;
scanf("%d%d%d%d", &b, &n, &d, &m);
if(b == 1){
vector<int> v;
for(int i = 1; i <= n; ++i){
int x;
scanf("%d", &x);
v.pb(x);
}
sort(all(v));
int answer = 0;
for(auto I = v.begin(); I != v.end(); ++I){
int x = *I;
auto it = upper_bound(all(v), x-d-1);
cnt += (I-it);
}
printf("%d\n", answer);
}
// else if(b == 2){
// auto get = [&](pair<int, int> A, pair<int, int> B) -> int {
// int a = A.ff, b = A.ss;
// int c = B.ff, d = B.ss;
// return (abs(a-c)+abs(b-d));
// };
// vector<pii> v;
// for(int i = 1; i <= n; ++i){
// int a, b;
// scanf("%d%d", &a, &b);
// v.pb({a, b});
// }
// int answer = 0;
// for(int i = 0; i < n; ++i)
// for(int j = i+1; j < n; ++j)
// if(get(v[i], v[j]) <= d)
// answer++;
// printf("%d\n", answer);
// }
// else{
// auto get = [&](tuple<int, int, int> A, tuple<int, int, int> B) -> int {
// int a, b, c, x, y, z;
// tie(a, b, c) = A;
// tie(x, y, z) = B;
// return (abs(a-x)+abs(b-y)+abs(c-z));
// };
// vector<tuple<int, int, int>> v;
// for(int i = 1; i <= n; ++i){
// int a, b, c;
// scanf("%d%d%d", &a, &b, &c);
// v.pb({a, b, c});
// }
// int answer = 0;
// for(int i = 0; i < n; ++i)
// for(int j = i+1; j < n; ++j)
// if(get(v[i], v[j]) <= d)
// answer++;
// printf("%d\n", answer);
// }
return 0;
}
Compilation message
pairs.cpp: In function 'int main()':
pairs.cpp:28:13: error: 'cnt' was not declared in this scope; did you mean 'int'?
28 | cnt += (I-it);
| ^~~
| int
pairs.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
15 | scanf("%d%d%d%d", &b, &n, &d, &m);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
pairs.cpp:20:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
20 | scanf("%d", &x);
| ~~~~~^~~~~~~~~~
