Submission #1269297

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269297		sula2	Triple Peaks (IOI25_triples)	C++20	18 / 100	2095 ms	1864 KiB

triples

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

long long count_triples(vector<int> H) {
    int ans = 0, n = H.size();
    auto add = [&](int i, int j, int k) {
        if (0 <= k && k < n && multiset<int>{j-i, k-i, k-j} ==
            multiset<int>{H[i], H[j], H[k]}) {
            ans++;
        }
    };
    for (int i = 0; i < n; i++) {
        for (int j = i+1; j < n; j++) {
            set<int> k{
                i + H[i],
                i + H[j],
                j + H[i],
                j + H[j]
            };
            for (int _ : k) add(i, j, _);
        }
    }
    return ans;
}

vector<int> construct_range(int, int) { return {}; }

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 0 / 6
• Subtask 3: 10 / 10
• Subtask 4: 0 / 11
• Subtask 5: 0 / 16
• Subtask 6: 0 / 19
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 5
• Subtask 10: 0 / 5
• Subtask 11: 0 / 5
• Subtask 12: 0 / 5