제출 #1082965

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1082965		n1k	벽 (IOI14_wall)	C++17	0 / 100	3017 ms	49140 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>

using namespace std;

using ll = long long;

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
  vector<array<ll, 3>> v;
  for(int i=0; i<k; i++){
    v.push_back({left[i], i, 0});
    v.push_back({right[i]+1, i, 1});
  }
  sort(v.begin(), v.end());
  reverse(v.begin(), v.end());

  vector<ll> hu(k, -1), ho(k, -1);
  for(int i=0; i<n; i++){
    while(v.back()[0]<=i){
      auto [b, id, tp]=v.back();
      v.pop_back();
      if(tp==0){
        if(op[id]==1){
          hu[id]=height[id];
        }else{
          ho[id]=height[id];
        }
      }else{
        if(op[id]==1){
          hu[id]=-1;
        }else{
          ho[id]=-1;
        } 
      }
    }
    ll o = 1e18, u = -1;
    bool bd = 1;
    for(int j=k-1; j>=0; j--){
      if(hu[j]!=-1){
        u = max(u, hu[j]);
      }if(ho[j]!=-1){
        o = min(o, ho[j]);
      }
      // >= ?
      if(u>o){
        if(u==hu[j]){
          finalHeight[i]=o;
          bd=0;
          break;
        }else if(o==ho[j]){
          finalHeight[i]=u;
          bd=0;
          break;
        }else{
          assert(false);
        }
      }
    }
    if(bd){
      finalHeight[i]=max(0ll, u);
    }
  }
  return;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 24
• Subtask 3: 0 / 29
• Subtask 4: 0 / 39