Submission #812168

#	Time	Username	Problem	Language	Result	Execution time	Memory
812168		kwongweng	Radio Towers (IOI22_towers)	C++17	18 / 100	787 ms	2484 KiB

towers

#include "towers.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef long double ld;
typedef pair<ll, ll> pll;
#define FOR(i, a, b) for(int i = a; i < b; i++)
#define ROF(i, a, b) for(int i = a; i >= b; i--)
#define ms memset
#define pb push_back
#define fi first
#define se second

int k, n; vi h;
vi cnt(1e5), pre(1e5);

void init(int N, vi H) {
  n=N; h=H;
  FOR(i,1,n-1){
    if (H[i]>max(H[i-1],H[i+1])){
      k=i; cnt[i]++;
    }
  }
  pre[0]=cnt[0];
  FOR(i,1,n) pre[i]=pre[i-1]+cnt[i];
}

int max_towers(int L, int R, int D) {
  if (R-L<=1) return 1;
  if (D==1){
    return pre[R-1] - pre[L] + 1;
  }
  if (L>=k || R<=k) return 1;
  if (max(h[L],h[R]) > h[k]-D) return 1;
  return 2;
}

• Subtask 1: 4 / 4
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 14 / 14
• Subtask 5: 0 / 17
• Subtask 6: 0 / 19
• Subtask 7: 0 / 23