Submission #1250379

#TimeUsernameProblemLanguageResultExecution timeMemory
1250379s4dzTriple Peaks (IOI25_triples)C++20
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; using ll = long long; ll count_triples(vector<int> H) { int n = H.size(); ll ans = 0; //hi = k - i for (int i = 0; i < n; i++) { int k = i + H[i]; if (k < 0 || k >= n) continue; //H[k] == j - i int j1 = i + H[k]; if (j1 > i && j1 < k && j1 < n && H[j1] == k - j1) ans++; //H[k] == k - j int j2 = k - H[k]; if (j2 > i && j2 < k && j2 < n && H[j2] == j2 - i) ans++; } //hk = k - i for (int k = 0; k < n; k++) { int i = k - H[k]; if (i < 0 || i >= n) continue; //H[i] == j - i => j = i + H[i], check H[j] == k - j int j1 = i + H[i]; if (j1 > i && j1 < k && j1 < n && H[j1] == k - j1) ans++; //H[i] == k - j => j = k - H[i], check H[j] == j - i int j2 = k - H[i]; if (j2 > i && j2 < k && j2 < n && H[j2] == j2 - i) ans++; } //hj = k - i, hi = j - i, hk = k - j for (int i = 0; i < n; i++) { int j = i + H[i]; if (j < 0 || j >= n) continue; int k = i + H[j]; if (k < 0 || k >= n) continue; if (j < k && H[j] == k - i && H[k] == k - j) ans++; } //hj = k - i, hi = k - j, hk = j - i //H[i] - i = H[j] - j for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { if (H[i] - i != H[j] - j) continue; int k = H[i] + j; if (k < 0 || k >= n) continue; if (j < k && H[k] == j - i) { ans++; } } } return ans; }

Compilation message (stderr)

/usr/bin/ld: /tmp/ccQNf1hb.o: in function `main':
grader.cpp:(.text.startup+0x18a): undefined reference to `construct_range(int, int)'
collect2: error: ld returned 1 exit status