# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1249473 | lunarecho | 3개의 봉우리 (IOI25_triples) | C++20 | 2095 ms | 1864 KiB |
#include "triples.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
bool is(int i, int j, int k, int hi, int hj, int hk) {
int d1 = j - i, d2 = k - i, d3 = k - j;
bool cond1 = (d1 == hi && d2 == hj && d3 == hk);
bool cond2 = (d1 == hi && d2 == hk && d3 == hj);
bool cond3 = (d1 == hj && d2 == hi && d3 == hk);
bool cond4 = (d1 == hj && d2 == hk && d3 == hi);
bool cond5 = (d1 == hk && d2 == hi && d3 == hj);
bool cond6 = (d1 == hk && d2 == hj && d3 == hi);
return cond1 || cond2 || cond3 || cond4 || cond5 || cond6;
}
long long count_triples(std::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)
{
for(int k=j+1;k<n;++k)
{
if(is(i,j,k,h[i],h[j],h[k]))
++cnt;
}
}
}
return cnt;
}
vector<int> construct_range (int, int) { }
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