답안 #1066740

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1066740	2024-08-20T06:07:34 Z	12345678	Alternating Current (BOI18_alternating)	C++17	13 / 100	3000 ms	3284 KB

alternating

#include <bits/stdc++.h>

using namespace std;

const int nx=1e5+5;

mt19937 rng(time(0));

int n, m, a[nx], b[nx], cur[nx], dp[nx], res[nx];
vector<pair<int, int>> v;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    for (int i=0; i<m; i++) 
    {
        cin>>a[i]>>b[i];
        v.push_back({0, i});
    }
    for (int t=0; t<1000; t++)
    {
        for (int i=0; i<m; i++) v[i].first=rng(), res[i]=0;
        for (int i=1; i<=n; i++) cur[i]=dp[i]=0;
        sort(v.begin(), v.end());
        for (int i=0; i<m;i ++)
        {
            if (a[i]<=b[i]) for (int j=a[i]; j<=b[i]; j++) cur[j]++;
            else
            {
                for (int j=a[i]; j<=n; j++) cur[j]++;
                for (int j=1; j<=b[i]; j++) cur[j]++;
            }
        }
        for (int i=0; i<m; i++)
        {
            int idx=v[i].second;
            int mn=INT_MAX;
            if (a[idx]<=b[idx]) for (int j=a[idx]; j<=b[idx]; j++) mn=min(mn, cur[j]);
            else
            {
                for (int j=a[idx]; j<=n; j++) mn=min(mn, cur[j]);
                for (int j=1; j<=b[idx]; j++) mn=min(mn, cur[j]);
            }
            if (mn>=2)
            {
                res[idx]=1;
                if (a[idx]<=b[idx]) for (int j=a[idx]; j<=b[idx]; j++) cur[j]--, dp[j]++;
                else
                {
                    for (int j=a[idx]; j<=n; j++) cur[j]--, dp[j]++;
                    for (int j=1; j<=b[idx]; j++) cur[j]--, dp[j]++;
                }
            }
        }
        int f=0;
        for (int i=1;i <=n;i ++) if (dp[i]==0) f=1;
        if (!f)
        {
            for (int i=0; i<m;i ++) cout<<res[i];
            return 0;
        }
    }
    cout<<"impossible";
}

Subtask #1
13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	600 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	1 ms	344 KB	Output is correct
14	Correct	1 ms	344 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	344 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	344 KB	Output is correct
20	Correct	0 ms	344 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	344 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	0 ms	468 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	1 ms	348 KB	Output is correct
31	Correct	0 ms	348 KB	Output is correct
32	Correct	0 ms	348 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	1 ms	348 KB	Output is correct
36	Correct	0 ms	348 KB	Output is correct
37	Correct	0 ms	604 KB	Output is correct
38	Correct	1 ms	348 KB	Output is correct
39	Correct	0 ms	348 KB	Output is correct
40	Correct	0 ms	344 KB	Output is correct

Subtask #2
0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	600 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	1 ms	344 KB	Output is correct
14	Correct	1 ms	344 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	344 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	344 KB	Output is correct
20	Correct	0 ms	344 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	344 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	0 ms	468 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	1 ms	348 KB	Output is correct
31	Correct	0 ms	348 KB	Output is correct
32	Correct	0 ms	348 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	1 ms	348 KB	Output is correct
36	Correct	0 ms	348 KB	Output is correct
37	Correct	0 ms	604 KB	Output is correct
38	Correct	1 ms	348 KB	Output is correct
39	Correct	0 ms	348 KB	Output is correct
40	Correct	0 ms	344 KB	Output is correct
41	Correct	0 ms	344 KB	Output is correct
42	Correct	1 ms	344 KB	Output is correct
43	Incorrect	5 ms	344 KB	'impossible' claimed, but there is a solution
44	Halted	0 ms	0 KB	-

Subtask #3
0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	600 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	1 ms	344 KB	Output is correct
14	Correct	1 ms	344 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	344 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	344 KB	Output is correct
20	Correct	0 ms	344 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	344 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	0 ms	468 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	1 ms	348 KB	Output is correct
31	Correct	0 ms	348 KB	Output is correct
32	Correct	0 ms	348 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	1 ms	348 KB	Output is correct
36	Correct	0 ms	348 KB	Output is correct
37	Correct	0 ms	604 KB	Output is correct
38	Correct	1 ms	348 KB	Output is correct
39	Correct	0 ms	348 KB	Output is correct
40	Correct	0 ms	344 KB	Output is correct
41	Correct	0 ms	344 KB	Output is correct
42	Correct	1 ms	344 KB	Output is correct
43	Incorrect	5 ms	344 KB	'impossible' claimed, but there is a solution
44	Halted	0 ms	0 KB	-

Subtask #4
0 / 19.0

#	결과	실행 시간	메모리	Grader output
1	Execution timed out	3030 ms	3284 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	600 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	1 ms	344 KB	Output is correct
14	Correct	1 ms	344 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	344 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	344 KB	Output is correct
20	Correct	0 ms	344 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	344 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	1 ms	348 KB	Output is correct
28	Correct	0 ms	468 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	1 ms	348 KB	Output is correct
31	Correct	0 ms	348 KB	Output is correct
32	Correct	0 ms	348 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	1 ms	348 KB	Output is correct
36	Correct	0 ms	348 KB	Output is correct
37	Correct	0 ms	604 KB	Output is correct
38	Correct	1 ms	348 KB	Output is correct
39	Correct	0 ms	348 KB	Output is correct
40	Correct	0 ms	344 KB	Output is correct
41	Correct	0 ms	344 KB	Output is correct
42	Correct	1 ms	344 KB	Output is correct
43	Incorrect	5 ms	344 KB	'impossible' claimed, but there is a solution
44	Halted	0 ms	0 KB	-

답안 #1066740

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