제출 #260157

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
260157		sckmd	Baloni (COCI15_baloni)	C++14	100 / 100	1410 ms	45720 KiB

baloni

#include <bits/stdc++.h>

using namespace std;
#define MAXN 1000005
typedef pair<int,int> pii;
set <pii> st;

void go(int height,int prev)
{
  if(st.lower_bound({height,prev})==st.end())return ;
  auto it = st.lower_bound({height,prev});
  pii x = *it;
  if(x.first != height)return ;
  if(x.second < prev)return ;
  st.erase(it);
  go(height-1,x.second);
}

int solve()
{
  int ans = 0;
  for(int height = MAXN-1; height > 0;)
  {
    if(st.lower_bound({height,-1})==st.end()){height--;continue;}
    /*auto it = st.lower_bound({height,-1});
    pii x = *it;
    if(x.first != height){height--;continue;}*/
    go(height,-1);
    ans++;
  }
  return ans;
}

int main()
{
  ios_base::sync_with_stdio(false);
  int n;
  cin >> n;
  for(int i = 1; i <= n; i++)
  {
    int h;
    cin >> h;
    st.insert({h,i});
  }
  cout << solve();
  return 0;
}

• Subtask 1: 100 / 100