Submission #1265427

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265427		thenpc	Triple Peaks (IOI25_triples)	C++20	0 / 100	2095 ms	3396 KiB

triples

#include <bits/stdc++.h>
#include "triples.h"
using namespace std;
#define ll long long
ll n,a[200005];
ll count_triples(vector<int> v){
  ll n=v.size();
  for(int i=1;i<=n;i++){
    a[i]=v[i-1];
  }
  ll ans=0;
  for(int i=1;i<=n;i++){
    ll srt=max(i-a[i],(ll)1);
    ll ed=min(i+a[i],n);
    for(int j=srt;j<=ed;j++){
      for(int k=j+1;k<=ed;k++){
        
        ll b[4]={k-j,k-i,j-i};
        ll c[4]={a[i],a[j],a[k]};
        sort(b,b+3);
        sort(c,c+3);
        int sol=1;
        for(int l=0;l<3;l++){
          if(b[l]!=c[l]){
            sol=0;
          }
        }
        ans+=sol;
      }
    }
  }
  return ans;
}
vector<int> construct_range(int m,int k){
  return {1};
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 6
• Subtask 3: 0 / 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