답안 #566689

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
566689	2022-05-22T16:25:05 Z	two_sides	Alternating Current (BOI18_alternating)	C++17	13 / 100	21 ms	11288 KB

alternating

#include <bits/stdc++.h>

using namespace std;

const int N = 100005;

int cnt[N], l[N], r[N], n, m;
vector<pair<int, int>> adj[N];
vector<int> path;
bool vis[N];

bool dfs(int u) {
    if (u == n) return 1;
    if (vis[u]) return 0;
    vis[u] = 1;
    for (auto e : adj[u]) {
        int v, i; tie(v, i) = e;
        path.push_back(i);
        if (dfs(v)) return 1;
        path.pop_back();
    }
    return 0;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> m;
    for (int i = 1; i <= m; i++)
        cin >> l[i] >> r[i];
    {
        int x = *min_element(l + 1, l + m + 1);
        for (int i = 1; i <= m; i++) {
            l[i] -= x; r[i] -= x;
            if (r[i] < 0) r[i] += n;
        }
    }
    for (int i = 1; i <= m; i++)
        if (l[i] <= r[i]) {
            cnt[l[i]]++; cnt[r[i] + 1]--;
            adj[l[i]].emplace_back(r[i] + 1, i);
            adj[l[i] + n].emplace_back(r[i] + 1 + n, i);
        } else {
            cnt[0]++; cnt[l[i]]++; cnt[r[i] + 1]--;
            adj[l[i]].emplace_back(r[i] + 1 + n, i);
        }
    for (int i = 0; i < n; i++) {    
        cnt[i + 1] += cnt[i];
        if (cnt[i] < 2)
            return cout << "impossible", 0;
        if (cnt[i] > 2) {
            adj[i + 1].emplace_back(i, 0);
            adj[i + 1 + n].emplace_back(i + n, 0);
        }
    }
    if (dfs(0)) {
        memset(cnt, 0, sizeof cnt);
        for (int i : path) cnt[i] = 1;
        for (int i = 1; i <= m; i++)
            cout << cnt[i];
    } else cout << "impossible";
}

Subtask #1
13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	3028 KB	Output is correct
2	Correct	3 ms	3028 KB	Output is correct
3	Correct	2 ms	3028 KB	Output is correct
4	Correct	2 ms	3060 KB	Output is correct
5	Correct	2 ms	3028 KB	Output is correct
6	Correct	2 ms	3028 KB	Output is correct
7	Correct	2 ms	3028 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	3028 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	3028 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	2 ms	3028 KB	Output is correct
15	Correct	2 ms	3028 KB	Output is correct
16	Correct	2 ms	3028 KB	Output is correct
17	Correct	2 ms	3028 KB	Output is correct
18	Correct	2 ms	3028 KB	Output is correct
19	Correct	2 ms	3028 KB	Output is correct
20	Correct	3 ms	3028 KB	Output is correct
21	Correct	2 ms	3028 KB	Output is correct
22	Correct	2 ms	3028 KB	Output is correct
23	Correct	2 ms	3028 KB	Output is correct
24	Correct	2 ms	3028 KB	Output is correct
25	Correct	2 ms	3028 KB	Output is correct
26	Correct	2 ms	3028 KB	Output is correct
27	Correct	3 ms	2644 KB	Output is correct
28	Correct	2 ms	3028 KB	Output is correct
29	Correct	2 ms	2644 KB	Output is correct
30	Correct	2 ms	2644 KB	Output is correct
31	Correct	2 ms	3028 KB	Output is correct
32	Correct	1 ms	2644 KB	Output is correct
33	Correct	2 ms	3028 KB	Output is correct
34	Correct	1 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	2 ms	3028 KB	Output is correct
37	Correct	3 ms	3028 KB	Output is correct
38	Correct	2 ms	2644 KB	Output is correct
39	Correct	2 ms	3028 KB	Output is correct
40	Correct	2 ms	3028 KB	Output is correct

Subtask #2
0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	3028 KB	Output is correct
2	Correct	3 ms	3028 KB	Output is correct
3	Correct	2 ms	3028 KB	Output is correct
4	Correct	2 ms	3060 KB	Output is correct
5	Correct	2 ms	3028 KB	Output is correct
6	Correct	2 ms	3028 KB	Output is correct
7	Correct	2 ms	3028 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	3028 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	3028 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	2 ms	3028 KB	Output is correct
15	Correct	2 ms	3028 KB	Output is correct
16	Correct	2 ms	3028 KB	Output is correct
17	Correct	2 ms	3028 KB	Output is correct
18	Correct	2 ms	3028 KB	Output is correct
19	Correct	2 ms	3028 KB	Output is correct
20	Correct	3 ms	3028 KB	Output is correct
21	Correct	2 ms	3028 KB	Output is correct
22	Correct	2 ms	3028 KB	Output is correct
23	Correct	2 ms	3028 KB	Output is correct
24	Correct	2 ms	3028 KB	Output is correct
25	Correct	2 ms	3028 KB	Output is correct
26	Correct	2 ms	3028 KB	Output is correct
27	Correct	3 ms	2644 KB	Output is correct
28	Correct	2 ms	3028 KB	Output is correct
29	Correct	2 ms	2644 KB	Output is correct
30	Correct	2 ms	2644 KB	Output is correct
31	Correct	2 ms	3028 KB	Output is correct
32	Correct	1 ms	2644 KB	Output is correct
33	Correct	2 ms	3028 KB	Output is correct
34	Correct	1 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	2 ms	3028 KB	Output is correct
37	Correct	3 ms	3028 KB	Output is correct
38	Correct	2 ms	2644 KB	Output is correct
39	Correct	2 ms	3028 KB	Output is correct
40	Correct	2 ms	3028 KB	Output is correct
41	Correct	2 ms	3028 KB	Output is correct
42	Correct	3 ms	3028 KB	Output is correct
43	Correct	2 ms	3028 KB	Output is correct
44	Correct	2 ms	3028 KB	Output is correct
45	Correct	1 ms	3028 KB	Output is correct
46	Correct	2 ms	3028 KB	Output is correct
47	Correct	2 ms	3028 KB	Output is correct
48	Correct	1 ms	2644 KB	Output is correct
49	Correct	2 ms	3028 KB	Output is correct
50	Correct	2 ms	2644 KB	Output is correct
51	Correct	2 ms	2644 KB	Output is correct
52	Correct	2 ms	2644 KB	Output is correct
53	Correct	3 ms	2644 KB	Output is correct
54	Correct	3 ms	3072 KB	Output is correct
55	Correct	2 ms	3028 KB	Output is correct
56	Correct	2 ms	3028 KB	Output is correct
57	Incorrect	1 ms	2644 KB	'impossible' claimed, but there is a solution
58	Halted	0 ms	0 KB	-

Subtask #3
0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	3028 KB	Output is correct
2	Correct	3 ms	3028 KB	Output is correct
3	Correct	2 ms	3028 KB	Output is correct
4	Correct	2 ms	3060 KB	Output is correct
5	Correct	2 ms	3028 KB	Output is correct
6	Correct	2 ms	3028 KB	Output is correct
7	Correct	2 ms	3028 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	3028 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	3028 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	2 ms	3028 KB	Output is correct
15	Correct	2 ms	3028 KB	Output is correct
16	Correct	2 ms	3028 KB	Output is correct
17	Correct	2 ms	3028 KB	Output is correct
18	Correct	2 ms	3028 KB	Output is correct
19	Correct	2 ms	3028 KB	Output is correct
20	Correct	3 ms	3028 KB	Output is correct
21	Correct	2 ms	3028 KB	Output is correct
22	Correct	2 ms	3028 KB	Output is correct
23	Correct	2 ms	3028 KB	Output is correct
24	Correct	2 ms	3028 KB	Output is correct
25	Correct	2 ms	3028 KB	Output is correct
26	Correct	2 ms	3028 KB	Output is correct
27	Correct	3 ms	2644 KB	Output is correct
28	Correct	2 ms	3028 KB	Output is correct
29	Correct	2 ms	2644 KB	Output is correct
30	Correct	2 ms	2644 KB	Output is correct
31	Correct	2 ms	3028 KB	Output is correct
32	Correct	1 ms	2644 KB	Output is correct
33	Correct	2 ms	3028 KB	Output is correct
34	Correct	1 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	2 ms	3028 KB	Output is correct
37	Correct	3 ms	3028 KB	Output is correct
38	Correct	2 ms	2644 KB	Output is correct
39	Correct	2 ms	3028 KB	Output is correct
40	Correct	2 ms	3028 KB	Output is correct
41	Correct	2 ms	3028 KB	Output is correct
42	Correct	3 ms	3028 KB	Output is correct
43	Correct	2 ms	3028 KB	Output is correct
44	Correct	2 ms	3028 KB	Output is correct
45	Correct	1 ms	3028 KB	Output is correct
46	Correct	2 ms	3028 KB	Output is correct
47	Correct	2 ms	3028 KB	Output is correct
48	Correct	1 ms	2644 KB	Output is correct
49	Correct	2 ms	3028 KB	Output is correct
50	Correct	2 ms	2644 KB	Output is correct
51	Correct	2 ms	2644 KB	Output is correct
52	Correct	2 ms	2644 KB	Output is correct
53	Correct	3 ms	2644 KB	Output is correct
54	Correct	3 ms	3072 KB	Output is correct
55	Correct	2 ms	3028 KB	Output is correct
56	Correct	2 ms	3028 KB	Output is correct
57	Incorrect	1 ms	2644 KB	'impossible' claimed, but there is a solution
58	Halted	0 ms	0 KB	-

Subtask #4
0 / 19.0

#	결과	실행 시간	메모리	Grader output
1	Runtime error	21 ms	11288 KB	Execution killed with signal 11
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	3028 KB	Output is correct
2	Correct	3 ms	3028 KB	Output is correct
3	Correct	2 ms	3028 KB	Output is correct
4	Correct	2 ms	3060 KB	Output is correct
5	Correct	2 ms	3028 KB	Output is correct
6	Correct	2 ms	3028 KB	Output is correct
7	Correct	2 ms	3028 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	3028 KB	Output is correct
10	Correct	1 ms	2644 KB	Output is correct
11	Correct	2 ms	2644 KB	Output is correct
12	Correct	2 ms	3028 KB	Output is correct
13	Correct	1 ms	2644 KB	Output is correct
14	Correct	2 ms	3028 KB	Output is correct
15	Correct	2 ms	3028 KB	Output is correct
16	Correct	2 ms	3028 KB	Output is correct
17	Correct	2 ms	3028 KB	Output is correct
18	Correct	2 ms	3028 KB	Output is correct
19	Correct	2 ms	3028 KB	Output is correct
20	Correct	3 ms	3028 KB	Output is correct
21	Correct	2 ms	3028 KB	Output is correct
22	Correct	2 ms	3028 KB	Output is correct
23	Correct	2 ms	3028 KB	Output is correct
24	Correct	2 ms	3028 KB	Output is correct
25	Correct	2 ms	3028 KB	Output is correct
26	Correct	2 ms	3028 KB	Output is correct
27	Correct	3 ms	2644 KB	Output is correct
28	Correct	2 ms	3028 KB	Output is correct
29	Correct	2 ms	2644 KB	Output is correct
30	Correct	2 ms	2644 KB	Output is correct
31	Correct	2 ms	3028 KB	Output is correct
32	Correct	1 ms	2644 KB	Output is correct
33	Correct	2 ms	3028 KB	Output is correct
34	Correct	1 ms	2644 KB	Output is correct
35	Correct	1 ms	2644 KB	Output is correct
36	Correct	2 ms	3028 KB	Output is correct
37	Correct	3 ms	3028 KB	Output is correct
38	Correct	2 ms	2644 KB	Output is correct
39	Correct	2 ms	3028 KB	Output is correct
40	Correct	2 ms	3028 KB	Output is correct
41	Correct	2 ms	3028 KB	Output is correct
42	Correct	3 ms	3028 KB	Output is correct
43	Correct	2 ms	3028 KB	Output is correct
44	Correct	2 ms	3028 KB	Output is correct
45	Correct	1 ms	3028 KB	Output is correct
46	Correct	2 ms	3028 KB	Output is correct
47	Correct	2 ms	3028 KB	Output is correct
48	Correct	1 ms	2644 KB	Output is correct
49	Correct	2 ms	3028 KB	Output is correct
50	Correct	2 ms	2644 KB	Output is correct
51	Correct	2 ms	2644 KB	Output is correct
52	Correct	2 ms	2644 KB	Output is correct
53	Correct	3 ms	2644 KB	Output is correct
54	Correct	3 ms	3072 KB	Output is correct
55	Correct	2 ms	3028 KB	Output is correct
56	Correct	2 ms	3028 KB	Output is correct
57	Incorrect	1 ms	2644 KB	'impossible' claimed, but there is a solution
58	Halted	0 ms	0 KB	-

답안 #566689

Compilation message

Subtask #1 13.0 / 13.0

Subtask #2 0 / 20.0

Subtask #3 0 / 22.0

Subtask #4 0 / 19.0

Subtask #5 0 / 26.0

Subtask #1
13.0 / 13.0

Subtask #2
0 / 20.0

Subtask #3
0 / 22.0

Subtask #4
0 / 19.0

Subtask #5
0 / 26.0