Submission #1269293

#	Time	Username	Problem	Language	Result	Execution time	Memory
1269293		sula2	Triple Peaks (IOI25_triples)	C++20	Compilation error	0 ms	0 KiB

triples

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

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

Compilation message (stderr)

/usr/bin/ld: /tmp/ccMbGRcg.o: in function `main':
grader.cpp:(.text.startup+0x197): undefined reference to `construct_range(int, int)'
collect2: error: ld returned 1 exit status