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Submission #1113607

# Submission time Handle Problem Language Result Execution time Memory
1113607 2024-11-16T19:28:50 Z ortsac Alternating Current (BOI18_alternating) C++17
13 / 100
 27 ms 2384 KB 
#include <bits/stdc++.h>

using namespace std;

#define pii pair<int, int>
#define fr first
#define se second

int32_t main() {
    int n, m;
    cin >> n >> m;
    vector<pii> r(m);
    for (int i = 0; i < m; i++) {
        cin >> r[i].fr >> r[i].se;
    }
    int ans = -1;
    for (int mask = 0; mask < (1 << m); mask++) {
        vector<vector<int>> qtd(2, vector<int>(n + 2));
        for (int i = 0; i < m; i++) {
            int w = ((mask & (1 << i)) > 0);
            auto u = r[i];
            qtd[w][u.fr]++;
            qtd[w][u.se + 1]--;
            if (u.se < u.fr) {
                qtd[w][1]++;
            }
        }
        for (int j = 0; j < 2; j++) {
            for (int i = 1; i <= n; i++) {
                qtd[j][i] += qtd[j][i - 1];
            }
        }
        bool ok = 1;
        for (int i = 1; i <= n; i++) {
            if (!(qtd[0][i] && qtd[1][i])) ok = 0;
        }
        if (ok) {
            ans = mask;
        }
    }
    if (ans == -1) {
        cout << "impossible\n";
    } else {
        for (int i = 0; i < m; i++) {
            if (ans & (1 << i)) cout << "1";
            else cout << "0";
        }
        cout << "\n";
    }
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 436 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 4 ms 436 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 5 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 5 ms 336 KB Output is correct
25 Correct 1 ms 444 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 5 ms 440 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 2 ms 336 KB Output is correct
35 Correct 4 ms 336 KB Output is correct
36 Correct 4 ms 440 KB Output is correct
37 Correct 4 ms 336 KB Output is correct
38 Correct 4 ms 336 KB Output is correct
39 Correct 4 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 436 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 4 ms 436 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 5 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 5 ms 336 KB Output is correct
25 Correct 1 ms 444 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 5 ms 440 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 2 ms 336 KB Output is correct
35 Correct 4 ms 336 KB Output is correct
36 Correct 4 ms 440 KB Output is correct
37 Correct 4 ms 336 KB Output is correct
38 Correct 4 ms 336 KB Output is correct
39 Correct 4 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct
41 Correct 1 ms 336 KB Output is correct
42 Correct 2 ms 336 KB Output is correct
43 Incorrect 1 ms 336 KB 'impossible' claimed, but there is a solution
44 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 436 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 4 ms 436 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 5 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 5 ms 336 KB Output is correct
25 Correct 1 ms 444 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 5 ms 440 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 2 ms 336 KB Output is correct
35 Correct 4 ms 336 KB Output is correct
36 Correct 4 ms 440 KB Output is correct
37 Correct 4 ms 336 KB Output is correct
38 Correct 4 ms 336 KB Output is correct
39 Correct 4 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct
41 Correct 1 ms 336 KB Output is correct
42 Correct 2 ms 336 KB Output is correct
43 Incorrect 1 ms 336 KB 'impossible' claimed, but there is a solution
44 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 27 ms 2384 KB 'impossible' claimed, but there is a solution
2 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 436 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 4 ms 436 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 5 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 5 ms 336 KB Output is correct
25 Correct 1 ms 444 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 5 ms 440 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 2 ms 336 KB Output is correct
35 Correct 4 ms 336 KB Output is correct
36 Correct 4 ms 440 KB Output is correct
37 Correct 4 ms 336 KB Output is correct
38 Correct 4 ms 336 KB Output is correct
39 Correct 4 ms 336 KB Output is correct
40 Correct 1 ms 336 KB Output is correct
41 Correct 1 ms 336 KB Output is correct
42 Correct 2 ms 336 KB Output is correct
43 Incorrect 1 ms 336 KB 'impossible' claimed, but there is a solution
44 Halted 0 ms 0 KB -