oj.uz

Submission #905208

# Submission time Handle Problem Language Result Execution time Memory
905208 2024-01-12T18:05:03 Z DAleksa Building 4 (JOI20_building4) C++17
100 / 100
 268 ms 45568 KB 
#include <bits/stdc++.h>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    n *= 2;
    vector<int> a(n), b(n);
    for(int i = 0; i < n; i++) cin >> a[i];
    for(int i = 0; i < n; i++) cin >> b[i];
    vector<int> mna(n, 1e9), mnb(n, 1e9), mxa(n, -1e9), mxb(n, -1e9);
    mna[0] = mxa[0] = 1;
    mnb[0] = mxb[0] = -1;
    for(int i = 1; i < n; i++) {
        if(a[i] >= a[i - 1]) {
            mxa[i] = max(mxa[i], mxa[i - 1]);
            mna[i] = min(mna[i], mna[i - 1]);
        }
        if(a[i] >= b[i - 1]) {
            mxa[i] = max(mxa[i], mxb[i - 1]);
            mna[i] = min(mna[i], mnb[i - 1]);
        }
        if(b[i] >= a[i - 1]) {
            mxb[i] = max(mxb[i], mxa[i - 1]);
            mnb[i] = min(mnb[i], mna[i - 1]);
        }
        if(b[i] >= b[i - 1]) {
            mxb[i] = max(mxb[i], mxb[i - 1]);
            mnb[i] = min(mnb[i], mnb[i - 1]);
        }
        mxa[i]++;
        mna[i]++;
        mxb[i]--;
        mnb[i]--;
    }
    if(min(mna[n - 1], mnb[n - 1]) > 0 || max(mxa[n - 1], mxb[n - 1]) < 0) {
        cout << -1;
        return 0;
    }
    string s;
    bool oka = true, okb = true;
    int border = 0;
    for(int i = n - 1; i >= 0; i--) {
        if(oka) {
            if(mna[i] <= border && border <= mxa[i]) {
                s += 'A';
                border--;
                oka = (a[i] >= a[i - 1]);
                okb = (a[i] >= b[i - 1]);
                continue;
            }
        }
        if(okb) {
            if(mnb[i] <= border && border <= mxb[i]) {
                s += 'B';
                border++;
                oka = (b[i] >= a[i - 1]);
                okb = (b[i] >= b[i - 1]);
            }
        }
    }
    reverse(s.begin(), s.end());
    cout << s;
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 608 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 616 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 2 ms 604 KB Output is correct
13 Correct 2 ms 604 KB Output is correct
14 Correct 2 ms 604 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 2 ms 464 KB Output is correct
17 Correct 2 ms 604 KB Output is correct
18 Correct 2 ms 1012 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 564 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 360 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 808 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 604 KB Output is correct

Subtask #2
89.0 / 89.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 608 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 616 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 2 ms 604 KB Output is correct
13 Correct 2 ms 604 KB Output is correct
14 Correct 2 ms 604 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 2 ms 464 KB Output is correct
17 Correct 2 ms 604 KB Output is correct
18 Correct 2 ms 1012 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 564 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 360 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 808 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 1 ms 604 KB Output is correct
34 Correct 173 ms 42440 KB Output is correct
35 Correct 184 ms 41948 KB Output is correct
36 Correct 175 ms 41320 KB Output is correct
37 Correct 179 ms 42120 KB Output is correct
38 Correct 177 ms 42256 KB Output is correct
39 Correct 168 ms 41268 KB Output is correct
40 Correct 179 ms 44712 KB Output is correct
41 Correct 178 ms 42512 KB Output is correct
42 Correct 207 ms 43816 KB Output is correct
43 Correct 187 ms 45396 KB Output is correct
44 Correct 189 ms 45568 KB Output is correct
45 Correct 186 ms 45404 KB Output is correct
46 Correct 180 ms 45384 KB Output is correct
47 Correct 214 ms 44520 KB Output is correct
48 Correct 233 ms 44284 KB Output is correct
49 Correct 186 ms 45128 KB Output is correct
50 Correct 196 ms 44644 KB Output is correct
51 Correct 196 ms 44360 KB Output is correct
52 Correct 139 ms 33860 KB Output is correct
53 Correct 150 ms 33612 KB Output is correct
54 Correct 139 ms 33612 KB Output is correct
55 Correct 133 ms 33356 KB Output is correct
56 Correct 268 ms 45536 KB Output is correct
57 Correct 199 ms 40472 KB Output is correct
58 Correct 169 ms 40388 KB Output is correct
59 Correct 159 ms 40392 KB Output is correct
60 Correct 221 ms 38416 KB Output is correct
61 Correct 202 ms 41036 KB Output is correct
62 Correct 179 ms 40732 KB Output is correct
63 Correct 244 ms 41064 KB Output is correct
64 Correct 146 ms 39696 KB Output is correct
65 Correct 183 ms 40996 KB Output is correct