| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 1316652 | ezzzay | 3개의 봉우리 (IOI25_triples) | C++17 | 2095 ms | 1948 KiB |
//#include "triples.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
long long count_triples(vector<int> H) {
int n=H.size();
ll cnt=0;
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
int a=H[i],b=H[j];
set<int>chk;
if(i+b>j)chk.insert(i+b);
chk.insert(j+b);
if(i+a>j)chk.insert(i+a);
chk.insert(j+a);
for(auto k:chk){
if(k>n)continue;
multiset<int>st={H[i],H[j],H[k]};
if(st.find(j-i)!=st.end())st.erase(st.find(j-i));
if(st.find(k-i)!=st.end())st.erase(st.find(k-i));
if(st.find(k-j)!=st.end())st.erase(st.find(k-j));
if(st.empty()){
cnt++;
}
}
}
}
return cnt;
}
vector<int> construct_range(int M, int K) {
}
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