oj.uz

답안 #892774

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
892774 2023-12-25T23:35:05 Z amirhoseinfar1385 건물 4 (JOI20_building4) C++17
100 / 100
 192 ms 45560 KB 
#include<bits/stdc++.h>
using namespace std;
const int maxn=1000000+10;
int n;
int dpl[maxn][2],dpr[maxn][2],all[maxn][2];
string res;

void cal(int ind,int vas,int ted=n){
	if(vas==1){
		res.push_back('B');
		ted--;
	}
	else{
		res.push_back('A');
	}
	if(ind==0){
		return ;
	}
	if(all[ind-1][vas]<=all[ind][vas]&&dpl[ind-1][vas]<=ted&&dpr[ind-1][vas]>=ted){
		return cal(ind-1,vas,ted);
	}
	return cal(ind-1,vas^1,ted);
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin>>n;
	n*=2;
	for(int i=0;i<n;i++){
		cin>>all[i][0];
	}
	for(int i=0;i<n;i++){
		cin>>all[i][1];
	}
	dpl[0][0]=dpr[0][0]=0;
	dpl[0][1]=dpr[0][1]=1;
	for(int i=1;i<n;i++){
		for(int j=0;j<2;j++){
			dpl[i][j]=maxn+10;
			dpr[i][j]=-1;
			if(dpr[i-1][j]!=-1&&all[i-1][j]<=all[i][j]){
				dpl[i][j]=dpl[i-1][j];
				dpr[i][j]=dpr[i-1][j];
			}
			if(dpr[i-1][j^1]!=-1&&all[i-1][j^1]<=all[i][j]){
				dpl[i][j]=min(dpl[i][j],dpl[i-1][j^1]);
				dpr[i][j]=max(dpr[i][j],dpr[i-1][j^1]);
			}
			if(dpr[i][j]!=-1&&j==1){
				dpr[i][j]++;
				dpl[i][j]++;
			}
		//	cout<<i<<" "<<j<<" "<<dpl[i][j]<<" "<<dpr[i][j]<<"\n";
		}
	}
	n/=2;
	if(n>=dpl[2*n-1][0]&&n<=dpr[2*n-1][0]){
		cal(2*n-1,0);
		reverse(res.begin(),res.end());
		cout<<res<<"\n";
		return 0;
	}
	if(n>=dpl[2*n-1][1]&&n<=dpr[2*n-1][1]){
		cal(2*n-1,1);
		reverse(res.begin(),res.end());
		cout<<res<<"\n";
		return 0;
	}
	cout<<-1<<"\n";
	return 0;
}

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4596 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4440 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4696 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4580 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4696 KB Output is correct
18 Correct 2 ms 4444 KB Output is correct
19 Correct 2 ms 4652 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Correct 1 ms 4440 KB Output is correct
23 Correct 2 ms 4444 KB Output is correct
24 Correct 2 ms 4700 KB Output is correct
25 Correct 2 ms 4444 KB Output is correct
26 Correct 1 ms 4444 KB Output is correct
27 Correct 1 ms 4632 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 1 ms 4444 KB Output is correct
30 Correct 2 ms 4700 KB Output is correct
31 Correct 1 ms 4444 KB Output is correct
32 Correct 1 ms 4444 KB Output is correct
33 Correct 1 ms 4444 KB Output is correct

Subtask #2
89.0 / 89.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4596 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4440 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4696 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4580 KB Output is correct
14 Correct 1 ms 4700 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4696 KB Output is correct
18 Correct 2 ms 4444 KB Output is correct
19 Correct 2 ms 4652 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Correct 1 ms 4440 KB Output is correct
23 Correct 2 ms 4444 KB Output is correct
24 Correct 2 ms 4700 KB Output is correct
25 Correct 2 ms 4444 KB Output is correct
26 Correct 1 ms 4444 KB Output is correct
27 Correct 1 ms 4632 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 1 ms 4444 KB Output is correct
30 Correct 2 ms 4700 KB Output is correct
31 Correct 1 ms 4444 KB Output is correct
32 Correct 1 ms 4444 KB Output is correct
33 Correct 1 ms 4444 KB Output is correct
34 Correct 179 ms 42744 KB Output is correct
35 Correct 166 ms 43048 KB Output is correct
36 Correct 192 ms 42680 KB Output is correct
37 Correct 163 ms 43184 KB Output is correct
38 Correct 153 ms 43360 KB Output is correct
39 Correct 156 ms 42428 KB Output is correct
40 Correct 165 ms 44948 KB Output is correct
41 Correct 148 ms 43208 KB Output is correct
42 Correct 166 ms 44300 KB Output is correct
43 Correct 190 ms 45452 KB Output is correct
44 Correct 172 ms 45384 KB Output is correct
45 Correct 183 ms 45180 KB Output is correct
46 Correct 165 ms 45316 KB Output is correct
47 Correct 159 ms 44360 KB Output is correct
48 Correct 157 ms 44308 KB Output is correct
49 Correct 163 ms 45132 KB Output is correct
50 Correct 172 ms 44388 KB Output is correct
51 Correct 173 ms 44516 KB Output is correct
52 Correct 118 ms 33612 KB Output is correct
53 Correct 118 ms 33860 KB Output is correct
54 Correct 104 ms 33608 KB Output is correct
55 Correct 105 ms 33276 KB Output is correct
56 Correct 167 ms 45560 KB Output is correct
57 Correct 135 ms 40268 KB Output is correct
58 Correct 138 ms 40520 KB Output is correct
59 Correct 143 ms 40580 KB Output is correct
60 Correct 128 ms 39440 KB Output is correct
61 Correct 137 ms 41032 KB Output is correct
62 Correct 146 ms 40692 KB Output is correct
63 Correct 140 ms 41032 KB Output is correct
64 Correct 140 ms 40208 KB Output is correct
65 Correct 135 ms 40932 KB Output is correct