Submission #1250366

#	Time	Username	Problem	Language	Result	Execution time	Memory
1250366		guymmk	Triple Peaks (IOI25_triples)	C++20	0 / 100	2096 ms	2632 KiB

triples

// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
#include "triples.h"
using namespace std;
vector<int> v;
int is_triple(vector<int>g){
  vector<int>a,b;
  a={g[1]-g[0],g[2]-g[0],g[2]-g[1]};
  b={v[g[0]],v[g[1]],v[g[2]]};
  sort(a.begin(),a.end());
  sort(b.begin(),b.end());
  return (int)(a==b);
}
long long count_triples(vector<int> hsh) {
    v=hsh;
    int ans=0;
    int n=v.size();
    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            if(v[i]!=j-i){
              if(v[i]>j-i)ans+=is_triple({i,j,i+v[i]});
              ans+=is_triple({i,j,j+v[i]});
            }
            if(v[i]!=j-i){
              ans+=is_triple({i,j,i+v[j]});
              ans+=is_triple({i,j,j+v[j]});
            }else if(v[i]==v[j]){
              ans+=is_triple({i,j,j+v[j]});
            }
        }
    }return ans/2;
}

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
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• Subtask 12: 0 / 5