Submission #954536

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
954536	2024-03-28 06:19:07	LCJLY	Building 4 (JOI20_building4)	C++14	100 / 100	285 ms	145980 KiB

building4

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#include <bits/stdc++.h>
using namespace std;
 
#define int long long 
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << "  " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << "  " << j << " " << #i << "  " << q << " " << #p << endl;
#define show4(x,y) for(auto it:y) cout << it << " "; cout << #x << endl;
typedef pair<int,int>pii;
typedef pair<pii,pii>pi2;
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
 
int n;
int a[1000005];
int b[1000005];
pii memo[1000005][2];
pii dp(int index, bool amos){
  if(index>2*n){
    return memo[index][amos]={0,0};
  }
  if(memo[index][amos].first!=-1) return memo[index][amos];
  pii ans={INT_MAX,INT_MIN};
  if(amos){
    if(a[index]>=a[index-1]){
      pii hold=dp(index+1,true);
      if(hold.first<=hold.second){
        ans.first=min(ans.first,hold.first+1);
        ans.second=max(ans.second,hold.second+1);
 
 
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• Subtask 1: 11 / 11
• Subtask 2: 89 / 89