#include<bits/stdc++.h>
using namespace std;
int triplets(vector<int>arr) {
map<int, int> k;
map<pair<int, int>, int> mpp;
vector<vector<int >> ssd;
int count = 0;
sort(arr.begin(), arr.end());
int i = 0;
while (i < arr.size()) {
if (k.find(arr[i]) == k.end()) {
k[arr[i]] = 1;
}
i += 1;
}
int j = 0;
while (j < arr.size() - 1) {
int q = j + 1;
while (q < arr.size()) {
if (k.find(arr[j] + arr[q]) != k.end() and mpp[ {arr[j], arr[q]}] != arr[j] + arr[q]) {
count += 1;
ssd.push_back({arr[j], arr[q], arr[j] + arr[q]});
mpp[ {arr[j], arr[q]}] = arr[j] + arr[q];
}
q += 1;
}
j += 1;
}
return count;
}
int main() {
int n;
cin >> n;
vector<int> arr(n);
for (int i = 0; i < n; i++) {
cin >> arr[i];
}
int count = triplets(arr);
cout << count << endl;
}
Replies to Question 1
Title |
Name |
Language |
UNIX |
When |
Question 2 |
Stained Matamata |
cpp |
1660977923 |
1 Year ago. |
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