oj.uz

Submission #771464

# Submission time Handle Problem Language Result Execution time Memory
771464 2023-07-03T03:44:44 Z vjudge1 Snake Escaping (JOI18_snake_escaping) C++17
22 / 100
 1925 ms 65536 KB 
// #cheat_when_I_was_young
// #cheatkhitacontre #khionhatoicheat
// #thaycuckythatvong
#include "bits/stdc++.h"
using namespace std;
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
const int N = 1<<20, M = 21;
int n, q, dp[N][M], sup[N][M];
string s, t;
int backtrack1(int idx, int num) {
    if (idx == n) return s[num];
    if (t[idx] == '0') return backtrack1(idx+1, num);
    if (t[idx] == '1') return backtrack1(idx+1, num | (1<<idx));
    return backtrack1(idx+1, num) + backtrack1(idx+1, num | (1<<idx));
}
int backtrack2(int idx, int num, int change) {
    if (idx == n) {
        if (change % 2) return -dp[num][0];
        return dp[num][0];
    }
    if (t[idx] == '0') return backtrack2(idx+1, num, change);
    if (t[idx] == '?') return backtrack2(idx+1, num | (1<<idx), change);
    return backtrack2(idx+1, num, change+1) + backtrack2(idx+1, num | (1<<idx), change);
}
int backtrack3(int idx, int num, int change) {
    if (idx == n) {
        if (change % 2) return -sup[num][0];
        return sup[num][0];
    }
    if (t[idx] == '1') return backtrack3(idx+1, num | (1<<idx), change);
    if (t[idx] == '?') return backtrack3(idx+1, num, change);
    return backtrack3(idx+1, num, change) + backtrack3(idx+1, num | (1<<idx), change+1);
}
signed main() {
	IOS;
    cin >> n >> q >> s;
    for (int mask = 0; mask < 1<<n; ++mask) {
        s[mask] -= '0';
        dp[mask][n] = sup[mask][n] = s[mask];
    }
    for (int mask = 0; mask < 1<<n; ++mask) for (int i = n-1; i >= 0; --i) {
        dp[mask][i] = dp[mask][i+1];
        if (mask & (1<<i)) dp[mask][i] += dp[mask^(1<<i)][i+1];
    }
    for (int mask = (1<<n)-1; mask >= 0; --mask) for (int i = n-1; i >= 0; --i) {
        sup[mask][i] = sup[mask][i+1];
        if (!(mask & (1<<i))) sup[mask][i] += sup[mask^(1<<i)][i+1];
    }
    while (q--) {
        cin >> t;
        reverse(t.begin(), t.end());
        int cnt[] = {0, 0, 0};
        for (char &c: t) {
            if (c == '0') ++cnt[0];
            else if (c == '1') ++cnt[1];
            else ++cnt[2];
        }
        if (cnt[2] <= 6) cout << backtrack1(0, 0) << endl;
        else if (cnt[1] <= 6) cout << backtrack2(0, 0, 0) << endl;
        else cout << backtrack3(0, 0, 0) << endl;
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 1343 ms 4592 KB Output is correct
12 Correct 1337 ms 4128 KB Output is correct
13 Correct 1315 ms 3412 KB Output is correct
14 Correct 1307 ms 3444 KB Output is correct
15 Correct 1665 ms 4596 KB Output is correct
16 Correct 1379 ms 3556 KB Output is correct
17 Correct 1388 ms 3520 KB Output is correct
18 Correct 1072 ms 5600 KB Output is correct
19 Correct 1112 ms 2496 KB Output is correct
20 Correct 1367 ms 4136 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 1343 ms 4592 KB Output is correct
12 Correct 1337 ms 4128 KB Output is correct
13 Correct 1315 ms 3412 KB Output is correct
14 Correct 1307 ms 3444 KB Output is correct
15 Correct 1665 ms 4596 KB Output is correct
16 Correct 1379 ms 3556 KB Output is correct
17 Correct 1388 ms 3520 KB Output is correct
18 Correct 1072 ms 5600 KB Output is correct
19 Correct 1112 ms 2496 KB Output is correct
20 Correct 1367 ms 4136 KB Output is correct
21 Correct 1778 ms 5708 KB Output is correct
22 Correct 1369 ms 5852 KB Output is correct
23 Correct 1485 ms 4764 KB Output is correct
24 Correct 1532 ms 4680 KB Output is correct
25 Correct 1320 ms 6664 KB Output is correct
26 Correct 1576 ms 5260 KB Output is correct
27 Correct 1558 ms 5052 KB Output is correct
28 Correct 1102 ms 7668 KB Output is correct
29 Correct 1179 ms 3612 KB Output is correct
30 Correct 1603 ms 5848 KB Output is correct
31 Correct 1925 ms 5660 KB Output is correct
32 Correct 1701 ms 5728 KB Output is correct
33 Correct 1318 ms 4560 KB Output is correct
34 Correct 1537 ms 4632 KB Output is correct
35 Correct 1555 ms 5152 KB Output is correct
36 Correct 1099 ms 3656 KB Output is correct
37 Correct 1682 ms 5752 KB Output is correct
38 Correct 1210 ms 3660 KB Output is correct
39 Correct 1466 ms 4876 KB Output is correct
40 Correct 1510 ms 4640 KB Output is correct

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Runtime error 38 ms 65536 KB Execution killed with signal 9
12 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 1343 ms 4592 KB Output is correct
12 Correct 1337 ms 4128 KB Output is correct
13 Correct 1315 ms 3412 KB Output is correct
14 Correct 1307 ms 3444 KB Output is correct
15 Correct 1665 ms 4596 KB Output is correct
16 Correct 1379 ms 3556 KB Output is correct
17 Correct 1388 ms 3520 KB Output is correct
18 Correct 1072 ms 5600 KB Output is correct
19 Correct 1112 ms 2496 KB Output is correct
20 Correct 1367 ms 4136 KB Output is correct
21 Correct 1778 ms 5708 KB Output is correct
22 Correct 1369 ms 5852 KB Output is correct
23 Correct 1485 ms 4764 KB Output is correct
24 Correct 1532 ms 4680 KB Output is correct
25 Correct 1320 ms 6664 KB Output is correct
26 Correct 1576 ms 5260 KB Output is correct
27 Correct 1558 ms 5052 KB Output is correct
28 Correct 1102 ms 7668 KB Output is correct
29 Correct 1179 ms 3612 KB Output is correct
30 Correct 1603 ms 5848 KB Output is correct
31 Correct 1925 ms 5660 KB Output is correct
32 Correct 1701 ms 5728 KB Output is correct
33 Correct 1318 ms 4560 KB Output is correct
34 Correct 1537 ms 4632 KB Output is correct
35 Correct 1555 ms 5152 KB Output is correct
36 Correct 1099 ms 3656 KB Output is correct
37 Correct 1682 ms 5752 KB Output is correct
38 Correct 1210 ms 3660 KB Output is correct
39 Correct 1466 ms 4876 KB Output is correct
40 Correct 1510 ms 4640 KB Output is correct
41 Runtime error 38 ms 65536 KB Execution killed with signal 9
42 Halted 0 ms 0 KB -