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Submission #792552

# Submission time Handle Problem Language Result Execution time Memory
792552 2023-07-25T06:52:08 Z vjudge1 Lamps (JOI19_lamps) C++17
10 / 100
 124 ms 3752 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long;

int len;
int s, t;

const int N = (1 << 19);

int get_num(string s) {
    int res = 0;
    for(int i = (int)s.size() - 1, pw = 1; i >= 0; i--, pw *= 2) {
        if(s[i] == '1') res += pw;
    }
    return res;
}
vector<int> g1, g2;
int dist[N];
vector<bool> vis(N);

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin >> len;
    string s0, t0;
    cin >> s0 >> t0;
    if(len <= 18) {

        s = get_num(s0), t = get_num(t0);
        for(int i = 0; i < len; i++) {
            int x = 0;
            for(int j = i; j < len; j++) {
                x |= (1 << j);
                g1.push_back(x);
                g2.push_back((((1 << len) - 1) ^ x));
            }
        }
        queue<int> q;
        q.push(s);
        vis[s] = 1;
        while(!q.empty()) {
            int cur = q.front();
            if(cur == t) break;
            q.pop();
            for(int c : g1) {
                int to = (cur | c);
                if(!vis[to]) q.push(to), dist[to] = dist[cur] + 1, vis[to] = 1;
                to = (cur ^ c);
                if(!vis[to]) q.push(to), dist[to] = dist[cur] + 1, vis[to] = 1;
            }
            for(int c : g2) {
                int to = (cur & c);
                if(!vis[to]) q.push(to), dist[to] = dist[cur] + 1, vis[to] = 1;
            }
        }
        cout << dist[t];
        return 0;
    }
    int cnt[2];
    for(int i = 0; i < len; i++) {
        cnt[t0[i] - '0'] += (i == 0 || t0[i - 1] != t0[i]);
    }
    cout << min(cnt[0], cnt[1]);
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 388 KB Output is correct
8 Correct 124 ms 1748 KB Output is correct
9 Correct 122 ms 1808 KB Output is correct
10 Correct 67 ms 1104 KB Output is correct
11 Correct 55 ms 1108 KB Output is correct
12 Correct 12 ms 1712 KB Output is correct
13 Correct 51 ms 1196 KB Output is correct
14 Correct 24 ms 1732 KB Output is correct
15 Correct 41 ms 1180 KB Output is correct
16 Correct 63 ms 1940 KB Output is correct
17 Correct 47 ms 1176 KB Output is correct
18 Correct 25 ms 1868 KB Output is correct
19 Correct 10 ms 1108 KB Output is correct
20 Correct 91 ms 1860 KB Output is correct
21 Correct 4 ms 908 KB Output is correct
22 Correct 22 ms 1884 KB Output is correct
23 Correct 29 ms 1144 KB Output is correct
24 Correct 3 ms 1492 KB Output is correct
25 Correct 2 ms 980 KB Output is correct
26 Correct 43 ms 1972 KB Output is correct
27 Correct 19 ms 1108 KB Output is correct
28 Correct 6 ms 776 KB Output is correct
29 Correct 88 ms 1876 KB Output is correct
30 Correct 51 ms 1136 KB Output is correct
31 Correct 3 ms 724 KB Output is correct
32 Correct 23 ms 1944 KB Output is correct
33 Correct 40 ms 1136 KB Output is correct
34 Correct 18 ms 724 KB Output is correct

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 388 KB Output is correct
8 Correct 124 ms 1748 KB Output is correct
9 Correct 122 ms 1808 KB Output is correct
10 Correct 67 ms 1104 KB Output is correct
11 Correct 55 ms 1108 KB Output is correct
12 Correct 12 ms 1712 KB Output is correct
13 Correct 51 ms 1196 KB Output is correct
14 Correct 24 ms 1732 KB Output is correct
15 Correct 41 ms 1180 KB Output is correct
16 Correct 63 ms 1940 KB Output is correct
17 Correct 47 ms 1176 KB Output is correct
18 Correct 25 ms 1868 KB Output is correct
19 Correct 10 ms 1108 KB Output is correct
20 Correct 91 ms 1860 KB Output is correct
21 Correct 4 ms 908 KB Output is correct
22 Correct 22 ms 1884 KB Output is correct
23 Correct 29 ms 1144 KB Output is correct
24 Correct 3 ms 1492 KB Output is correct
25 Correct 2 ms 980 KB Output is correct
26 Correct 43 ms 1972 KB Output is correct
27 Correct 19 ms 1108 KB Output is correct
28 Correct 6 ms 776 KB Output is correct
29 Correct 88 ms 1876 KB Output is correct
30 Correct 51 ms 1136 KB Output is correct
31 Correct 3 ms 724 KB Output is correct
32 Correct 23 ms 1944 KB Output is correct
33 Correct 40 ms 1136 KB Output is correct
34 Correct 18 ms 724 KB Output is correct
35 Correct 2 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Incorrect 0 ms 340 KB Output isn't correct
39 Halted 0 ms 0 KB -

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 352 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 388 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 388 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 8 ms 3012 KB Output is correct
8 Correct 6 ms 2984 KB Output is correct
9 Correct 9 ms 2988 KB Output is correct
10 Correct 8 ms 3752 KB Output is correct
11 Correct 8 ms 3596 KB Output is correct
12 Correct 10 ms 3540 KB Output is correct
13 Correct 11 ms 3716 KB Output is correct
14 Correct 7 ms 3608 KB Output is correct

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 388 KB Output is correct
8 Correct 124 ms 1748 KB Output is correct
9 Correct 122 ms 1808 KB Output is correct
10 Correct 67 ms 1104 KB Output is correct
11 Correct 55 ms 1108 KB Output is correct
12 Correct 12 ms 1712 KB Output is correct
13 Correct 51 ms 1196 KB Output is correct
14 Correct 24 ms 1732 KB Output is correct
15 Correct 41 ms 1180 KB Output is correct
16 Correct 63 ms 1940 KB Output is correct
17 Correct 47 ms 1176 KB Output is correct
18 Correct 25 ms 1868 KB Output is correct
19 Correct 10 ms 1108 KB Output is correct
20 Correct 91 ms 1860 KB Output is correct
21 Correct 4 ms 908 KB Output is correct
22 Correct 22 ms 1884 KB Output is correct
23 Correct 29 ms 1144 KB Output is correct
24 Correct 3 ms 1492 KB Output is correct
25 Correct 2 ms 980 KB Output is correct
26 Correct 43 ms 1972 KB Output is correct
27 Correct 19 ms 1108 KB Output is correct
28 Correct 6 ms 776 KB Output is correct
29 Correct 88 ms 1876 KB Output is correct
30 Correct 51 ms 1136 KB Output is correct
31 Correct 3 ms 724 KB Output is correct
32 Correct 23 ms 1944 KB Output is correct
33 Correct 40 ms 1136 KB Output is correct
34 Correct 18 ms 724 KB Output is correct
35 Correct 2 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Incorrect 0 ms 340 KB Output isn't correct
39 Halted 0 ms 0 KB -