Submission #1252427

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252427		bzzzzzzzzzz	Triple Peaks (IOI25_triples)	C++20	Compilation error	0 ms	0 KiB

triples

#include <bits/stdc++.h>
#include "triples.h"
using namespace std;
using ll = long long;

 std::vector<int> construct_range(int M, int K) {
     return {1};
 }

long long count_triples(vector<int> H) {
    int n = (int)H.size();
    ll ans = 0;
    if (n <= 2000) {
        for (int i = 0; i < n; i++) {
            for (int k = i + 2; k < n; k++) {
                int x = k - i;
                if (x == H[i]) {
                    if (H[k] < x) {
                        if (H[i + H[k]] == k - (i + H[k])) {
                            ans++;
                        }
                        if (i + H[k] + H[k] != k && H[k - H[k]] == (k - H[k]) - i) {
                            ans++;
                        }
                    }
                } else if (x == H[k]) {
                    if (H[i] < x) {
                        if (H[i + H[i]] == k - (i + H[i])) {
                            ans++;
                        }
                        if (i + H[i] + H[i] != k && H[k - H[i]] == (k - H[i]) - i) {
                            ans++;
                        }
                    }
                } else {
                    if (H[i] + H[k] == x) {
                        if (H[i + H[i]] == x) {
                            ans++;
                        }
                        if (i + H[i] + H[i] != k && H[i + H[k]] == x) {
                            ans++;
                        }
                    }
                }
            }
        }
    } else {
        for (int k = 0; k < n; k++) {
            int j = i - H[k];
            if (j < 0) {
                continue;
            }
            if (H[i + H[i] == k - (i + H[i])) {
                ans++;
            }
            if (i + H[i] + H[i] != k && (k - H[i]) - i == H[k - H[i]]) {
                ans++;
            }
        }
    }
    return ans;
}

Compilation message (stderr)

triples.cpp: In function 'long long int count_triples(std::vector<int>)':
triples.cpp:49:21: error: 'i' was not declared in this scope
   49 |             int j = i - H[k];
      |                     ^
triples.cpp:53:45: error: expected ']' before ')' token
   53 |             if (H[i + H[i] == k - (i + H[i])) {
      |                                             ^
      |                                             ]