oj.uz

Submission #565243

# Submission time Handle Problem Language Result Execution time Memory
565243 2022-05-20T14:17:23 Z errorgorn Building 4 (JOI20_building4) C++17
100 / 100
 261 ms 68880 KB 
// Super Idol的笑容
//    都没你的甜
//  八月正午的阳光
//    都没你耀眼
//  热爱105°C的你
// 滴滴清纯的蒸馏水

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;

#define int long long
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << ": " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(int x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n;
int arr[1000005][2];
ii memo[1000005][2];

signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n;
	rep(x,1,2*n+1) cin>>arr[x][0];
	rep(x,1,2*n+1) cin>>arr[x][1];
	
	rep(x,0,1000005) rep(y,0,2) memo[x][y]={1e9,-1e9};
	memo[1][0]={0,0};
	memo[1][1]={1,1};
	
	rep(x,1,2*n) rep(a,0,2) rep(b,0,2) if (arr[x][a]<=arr[x+1][b]){
		memo[x+1][b]={
			min(memo[x+1][b].fi,memo[x][a].fi+b),
			max(memo[x+1][b].se,memo[x][a].se+b)
		};
	}
	
	int py=-1;
	rep(x,0,2) if (memo[2*n][x].fi<=n && n<=memo[2*n][x].se) py=x;
	
	if (py==-1){
		cout<<"-1"<<endl;
		return 0;
	}
	
	string ans="";
	
	ans+='A'+py;
	
	int curr=n;
	rep(x,2*n,1){
		if (py) curr--;
		rep(y,0,2) if (arr[x][y]<=arr[x+1][py] && memo[x][y].fi<=curr && curr<=memo[x][y].se){
			py=y;
			break;
		}
		ans+='A'+py;
	}
	
	reverse(all(ans));
	cout<<ans<<endl;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 31572 KB Output is correct
2 Correct 17 ms 31524 KB Output is correct
3 Correct 15 ms 31508 KB Output is correct
4 Correct 16 ms 31624 KB Output is correct
5 Correct 16 ms 31748 KB Output is correct
6 Correct 16 ms 31772 KB Output is correct
7 Correct 15 ms 31692 KB Output is correct
8 Correct 15 ms 31700 KB Output is correct
9 Correct 15 ms 31704 KB Output is correct
10 Correct 15 ms 31700 KB Output is correct
11 Correct 16 ms 31728 KB Output is correct
12 Correct 22 ms 31772 KB Output is correct
13 Correct 17 ms 31760 KB Output is correct
14 Correct 19 ms 31700 KB Output is correct
15 Correct 14 ms 31680 KB Output is correct
16 Correct 15 ms 31764 KB Output is correct
17 Correct 15 ms 31700 KB Output is correct
18 Correct 15 ms 31696 KB Output is correct
19 Correct 16 ms 31708 KB Output is correct
20 Correct 15 ms 31700 KB Output is correct
21 Correct 15 ms 31720 KB Output is correct
22 Correct 15 ms 31700 KB Output is correct
23 Correct 16 ms 31768 KB Output is correct
24 Correct 15 ms 31748 KB Output is correct
25 Correct 15 ms 31700 KB Output is correct
26 Correct 17 ms 31704 KB Output is correct
27 Correct 16 ms 31700 KB Output is correct
28 Correct 15 ms 31700 KB Output is correct
29 Correct 14 ms 31700 KB Output is correct
30 Correct 17 ms 31632 KB Output is correct
31 Correct 16 ms 31648 KB Output is correct
32 Correct 15 ms 31692 KB Output is correct
33 Correct 18 ms 31704 KB Output is correct

Subtask #2
89.0 / 89.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 31572 KB Output is correct
2 Correct 17 ms 31524 KB Output is correct
3 Correct 15 ms 31508 KB Output is correct
4 Correct 16 ms 31624 KB Output is correct
5 Correct 16 ms 31748 KB Output is correct
6 Correct 16 ms 31772 KB Output is correct
7 Correct 15 ms 31692 KB Output is correct
8 Correct 15 ms 31700 KB Output is correct
9 Correct 15 ms 31704 KB Output is correct
10 Correct 15 ms 31700 KB Output is correct
11 Correct 16 ms 31728 KB Output is correct
12 Correct 22 ms 31772 KB Output is correct
13 Correct 17 ms 31760 KB Output is correct
14 Correct 19 ms 31700 KB Output is correct
15 Correct 14 ms 31680 KB Output is correct
16 Correct 15 ms 31764 KB Output is correct
17 Correct 15 ms 31700 KB Output is correct
18 Correct 15 ms 31696 KB Output is correct
19 Correct 16 ms 31708 KB Output is correct
20 Correct 15 ms 31700 KB Output is correct
21 Correct 15 ms 31720 KB Output is correct
22 Correct 15 ms 31700 KB Output is correct
23 Correct 16 ms 31768 KB Output is correct
24 Correct 15 ms 31748 KB Output is correct
25 Correct 15 ms 31700 KB Output is correct
26 Correct 17 ms 31704 KB Output is correct
27 Correct 16 ms 31700 KB Output is correct
28 Correct 15 ms 31700 KB Output is correct
29 Correct 14 ms 31700 KB Output is correct
30 Correct 17 ms 31632 KB Output is correct
31 Correct 16 ms 31648 KB Output is correct
32 Correct 15 ms 31692 KB Output is correct
33 Correct 18 ms 31704 KB Output is correct
34 Correct 258 ms 66020 KB Output is correct
35 Correct 247 ms 65940 KB Output is correct
36 Correct 261 ms 65396 KB Output is correct
37 Correct 246 ms 66064 KB Output is correct
38 Correct 226 ms 66232 KB Output is correct
39 Correct 211 ms 65296 KB Output is correct
40 Correct 226 ms 68240 KB Output is correct
41 Correct 226 ms 66140 KB Output is correct
42 Correct 242 ms 67464 KB Output is correct
43 Correct 255 ms 68628 KB Output is correct
44 Correct 243 ms 68680 KB Output is correct
45 Correct 232 ms 68808 KB Output is correct
46 Correct 239 ms 68812 KB Output is correct
47 Correct 223 ms 67784 KB Output is correct
48 Correct 231 ms 67696 KB Output is correct
49 Correct 230 ms 68396 KB Output is correct
50 Correct 248 ms 67860 KB Output is correct
51 Correct 246 ms 67804 KB Output is correct
52 Correct 172 ms 56940 KB Output is correct
53 Correct 167 ms 56912 KB Output is correct
54 Correct 150 ms 56980 KB Output is correct
55 Correct 156 ms 56640 KB Output is correct
56 Correct 214 ms 68880 KB Output is correct
57 Correct 203 ms 63764 KB Output is correct
58 Correct 193 ms 63936 KB Output is correct
59 Correct 193 ms 63948 KB Output is correct
60 Correct 182 ms 62324 KB Output is correct
61 Correct 202 ms 64340 KB Output is correct
62 Correct 194 ms 63972 KB Output is correct
63 Correct 191 ms 64348 KB Output is correct
64 Correct 189 ms 63248 KB Output is correct
65 Correct 201 ms 64516 KB Output is correct