| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1307814 | exoworldgd | Triple Peaks (IOI25_triples) | C++20 | 0 ms | 0 KiB |
#pragma GCC optimize("Ofast,unroll-loops,inline,fast-math,omit-frame-pointer")
#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt,tune=native,fma")
#include <bits/stdc++.h>
#define exoworldgd cin.tie(0)->sync_with_stdio(0),cout.tie(0)
using namespace std;
using ll=long long;
ll count_triples(vector<int>h){
int n=h.size(),sq=sqrt(n)+1;
ll ans=0;
vector<int>pos[n];
for(int i=0;i<n;i++)pos[h[i]].push_back(i);
for(int v=1;v<n;v++){
if(v<=sq){
for(int i:pos[v])for(int j:pos[v])if(i<j){
int k=j+v;
if(k<n){
vector<int>a={h[i],h[j],h[k]},b={j-i,k-i,k-j};
sort(a.begin(),a.end()),sort(b.begin(),b.end()),ans+=a==b;
}
}
}else{
for(int i=0;i<n;i++){
int j=i+v,k=i+2*v;
if(k<n){
vector<int>a={h[i],h[j],h[k]},b={v,2*v,v};
sort(a.begin(),a.end()),sort(b.begin(),b.end()),ans+=a==b;
}
}
}
}
return ans;
}
vector<int>construct_range(int m,int k){
vector<int>res;
int pat[]={1,2,1,3,2,1,4,3,2,1},sz=10;
for(int i=0;i<m;i++)res.push_back(pat[i%sz]);
return res;
}