oj.uz

Submission #967169

# Submission time Handle Problem Language Result Execution time Memory
967169 2024-04-21T11:39:20 Z AlperenT_ Building 4 (JOI20_building4) C++14
100 / 100
 189 ms 69024 KB 
#include <bits/stdc++.h>

#pragma GCC optimize("O3,unroll-loops")
#define pb push_back
#define F first
#define S second 
#define ld long double
#define all(a) a.begin(),a.end()
#define pii pair <int,int>
#define int long long 
#define PII pair<pii , pii>
#define sz(v) (int)v.size()
#define rep(i , a , b) for(int i=a;i <= (b);i++)
#define per(i , a , b) for(int i=a;i >= (b);i--)
#define deb(x) cout <<#x << " : " << x << "\n" ;
using namespace std ;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxn = 1e6+10 + 10,  inf = 1e9+10 , mod = 1e9 + 7 ;
pii dp[maxn][2]; 
int a[2][maxn];
string s ;
pii mrg(pii a, pii b){
    return {min(a.F,b.F) , max(a.S,b.S)};
}

void sl(int i ,int t ,int x){
    if(i==0)return ;
    if(t==1)x--;
    s += (t==1 ? "B" : "A") ;
    rep(j , 0 ,1){
        if(dp[i-1][j].F <= x && dp[i-1][j].S >= x && a[j][i-1] <= a[t][i]){
            sl(i-1, j , x) ;
            return ; 
        }
    }
}

signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); 
    int n;
    cin >> n ;
    rep(i ,1 , 2*n){
        cin >> a[0][i] ;
    }
    rep(i , 1, 2*n){
        cin >> a[1][i]; 
    }
    dp[1][0] = {0 , 0};
    dp[1][1] = {1, 1} ;
    rep(i , 2, 2*n){
        rep(j , 0 ,1){
            dp[i][j] ={inf,-inf}; 
            rep(k , 0 , 1){
                if(a[j][i] >= a[k][i-1]){
                    dp[i][j] = mrg(dp[i][j] , dp[i-1][k]) ;
                }
            }
        }
        dp[i][1].F++;
        dp[i][1].S++;
    }
    if(dp[2*n][0].F <=n && dp[2*n][0].S >= n){
        sl(2*n , 0 , n) ;
    }else if(dp[2*n][1].F <=n && dp[2*n][1].S >= n){
        sl(2*n , 1 , n);
    }else{
        cout << "-1\n";
        exit(0);
    }
    reverse(all(s)) ;
    cout << s << "\n"; 
    return 0 ;
}
/*


*/

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4696 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 2 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 2 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 2 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 2 ms 4444 KB Output is correct
13 Correct 2 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4696 KB Output is correct
16 Correct 2 ms 4444 KB Output is correct
17 Correct 1 ms 4596 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Correct 2 ms 4696 KB Output is correct
23 Correct 2 ms 4444 KB Output is correct
24 Correct 1 ms 4444 KB Output is correct
25 Correct 1 ms 4444 KB Output is correct
26 Correct 1 ms 4444 KB Output is correct
27 Correct 1 ms 4444 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 1 ms 4444 KB Output is correct
30 Correct 1 ms 4444 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4696 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 2 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 2 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 2 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 2 ms 4444 KB Output is correct
13 Correct 2 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4696 KB Output is correct
16 Correct 2 ms 4444 KB Output is correct
17 Correct 1 ms 4596 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Correct 2 ms 4696 KB Output is correct
23 Correct 2 ms 4444 KB Output is correct
24 Correct 1 ms 4444 KB Output is correct
25 Correct 1 ms 4444 KB Output is correct
26 Correct 1 ms 4444 KB Output is correct
27 Correct 1 ms 4444 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 1 ms 4444 KB Output is correct
30 Correct 1 ms 4444 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 167 ms 46720 KB Output is correct
35 Correct 161 ms 65460 KB Output is correct
36 Correct 170 ms 65216 KB Output is correct
37 Correct 163 ms 65612 KB Output is correct
38 Correct 167 ms 65588 KB Output is correct
39 Correct 151 ms 64840 KB Output is correct
40 Correct 167 ms 68204 KB Output is correct
41 Correct 164 ms 65468 KB Output is correct
42 Correct 166 ms 66908 KB Output is correct
43 Correct 178 ms 68848 KB Output is correct
44 Correct 189 ms 68892 KB Output is correct
45 Correct 175 ms 68792 KB Output is correct
46 Correct 177 ms 69024 KB Output is correct
47 Correct 183 ms 67944 KB Output is correct
48 Correct 171 ms 67580 KB Output is correct
49 Correct 174 ms 68584 KB Output is correct
50 Correct 172 ms 67824 KB Output is correct
51 Correct 177 ms 68072 KB Output is correct
52 Correct 120 ms 57164 KB Output is correct
53 Correct 128 ms 57092 KB Output is correct
54 Correct 118 ms 56960 KB Output is correct
55 Correct 114 ms 56648 KB Output is correct
56 Correct 171 ms 69008 KB Output is correct
57 Correct 145 ms 63820 KB Output is correct
58 Correct 147 ms 64076 KB Output is correct
59 Correct 150 ms 64080 KB Output is correct
60 Correct 147 ms 61716 KB Output is correct
61 Correct 157 ms 64588 KB Output is correct
62 Correct 149 ms 63816 KB Output is correct
63 Correct 153 ms 64548 KB Output is correct
64 Correct 155 ms 62928 KB Output is correct
65 Correct 150 ms 64496 KB Output is correct