Submission #463525

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
463525	2021-08-11 09:42:51	amunduzbaev	Exam (eJOI20_exam)	C++14	100 / 100	191 ms	8936 KiB

exam

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#include "bits/stdc++.h"
using namespace std;
 
//~ #define int long long
 
void solve1(int n, vector<int>& a, vector<int>& b){
  vector<int> dp(n);
  int res = 0;
  for(int i=0;i<n;i++){
    int s = i, e = i;
    while(s + 1 < n && a[s + 1] <= a[i]) s++;
    while(e && a[e - 1] <= a[i]) e--;
    vector<int> cnt(n);
    for(int j=0;j<n;j++){
      if(j) cnt[j] = cnt[j-1];
      cnt[j] += (b[j] == a[i]);
    }
    vector<int> pref(n, -1e9);
    for(int j=e;j<n;j++){
      if(j) pref[j] = pref[j-1];
      pref[j] = max(pref[j], (j ? - cnt[j-1] + dp[j-1] : 0));
    }
    for(int r=s;r>=e;r--){
      dp[r] = max(dp[r], cnt[r] + pref[r]);
    }
  }
  
 
 
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• Subtask 1: 14 / 14
• Subtask 2: 12 / 12
• Subtask 3: 13 / 13
• Subtask 4: 23 / 23
• Subtask 5: 16 / 16
• Subtask 6: 22 / 22