Submission #1250553

#	Time	Username	Problem	Language	Result	Execution time	Memory
1250553		nikd	Triple Peaks (IOI25_triples)	C++20	11 / 100	13 ms	1968 KiB

triples

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

long long count_triples(std::vector<int> H) {
  int n = H.size();
  ll sol = 0;
 
  for(int i = 2; i<n; i++){
    if(i-H[i] >= 0){
        int ha = H[i-H[i]];
        int a = i-H[i];
        if(ha == H[i]) continue;
        if(H[a+ha] == H[i]-ha) sol++;
        if(2*ha != H[i] && H[i-ha] == H[i]-ha) sol++;
    }
  }
  return sol;
}

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

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 6
• Subtask 3: 0 / 10
• Subtask 4: 11 / 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