oj.uz

Submission #771457

# Submission time Handle Problem Language Result Execution time Memory
771457 2023-07-03T03:31:36 Z vjudge1 Snake Escaping (JOI18_snake_escaping) C++17
22 / 100
 629 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];
        }
        int mi = *min_element(cnt, cnt+3);
        if (cnt[2] == mi) cout << backtrack1(0, 0) << "\n";
        else if (cnt[1] == mi) cout << backtrack2(0, 0, 0) << "\n";
        else cout << backtrack3(0, 0, 0) << "\n";
    }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 188 ms 15164 KB Output is correct
12 Correct 236 ms 14924 KB Output is correct
13 Correct 300 ms 14228 KB Output is correct
14 Correct 391 ms 14180 KB Output is correct
15 Correct 295 ms 15188 KB Output is correct
16 Correct 371 ms 14424 KB Output is correct
17 Correct 351 ms 14300 KB Output is correct
18 Correct 151 ms 16216 KB Output is correct
19 Correct 178 ms 13200 KB Output is correct
20 Correct 240 ms 14856 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 188 ms 15164 KB Output is correct
12 Correct 236 ms 14924 KB Output is correct
13 Correct 300 ms 14228 KB Output is correct
14 Correct 391 ms 14180 KB Output is correct
15 Correct 295 ms 15188 KB Output is correct
16 Correct 371 ms 14424 KB Output is correct
17 Correct 351 ms 14300 KB Output is correct
18 Correct 151 ms 16216 KB Output is correct
19 Correct 178 ms 13200 KB Output is correct
20 Correct 240 ms 14856 KB Output is correct
21 Correct 252 ms 19356 KB Output is correct
22 Correct 270 ms 19572 KB Output is correct
23 Correct 441 ms 18524 KB Output is correct
24 Correct 598 ms 18396 KB Output is correct
25 Correct 304 ms 20428 KB Output is correct
26 Correct 535 ms 18824 KB Output is correct
27 Correct 466 ms 18836 KB Output is correct
28 Correct 164 ms 21324 KB Output is correct
29 Correct 248 ms 17380 KB Output is correct
30 Correct 269 ms 19540 KB Output is correct
31 Correct 416 ms 19468 KB Output is correct
32 Correct 629 ms 19340 KB Output is correct
33 Correct 313 ms 18256 KB Output is correct
34 Correct 542 ms 18436 KB Output is correct
35 Correct 505 ms 18868 KB Output is correct
36 Correct 167 ms 17380 KB Output is correct
37 Correct 253 ms 19348 KB Output is correct
38 Correct 265 ms 17392 KB Output is correct
39 Correct 431 ms 18604 KB Output is correct
40 Correct 582 ms 18336 KB Output is correct

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Runtime error 32 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 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 464 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 188 ms 15164 KB Output is correct
12 Correct 236 ms 14924 KB Output is correct
13 Correct 300 ms 14228 KB Output is correct
14 Correct 391 ms 14180 KB Output is correct
15 Correct 295 ms 15188 KB Output is correct
16 Correct 371 ms 14424 KB Output is correct
17 Correct 351 ms 14300 KB Output is correct
18 Correct 151 ms 16216 KB Output is correct
19 Correct 178 ms 13200 KB Output is correct
20 Correct 240 ms 14856 KB Output is correct
21 Correct 252 ms 19356 KB Output is correct
22 Correct 270 ms 19572 KB Output is correct
23 Correct 441 ms 18524 KB Output is correct
24 Correct 598 ms 18396 KB Output is correct
25 Correct 304 ms 20428 KB Output is correct
26 Correct 535 ms 18824 KB Output is correct
27 Correct 466 ms 18836 KB Output is correct
28 Correct 164 ms 21324 KB Output is correct
29 Correct 248 ms 17380 KB Output is correct
30 Correct 269 ms 19540 KB Output is correct
31 Correct 416 ms 19468 KB Output is correct
32 Correct 629 ms 19340 KB Output is correct
33 Correct 313 ms 18256 KB Output is correct
34 Correct 542 ms 18436 KB Output is correct
35 Correct 505 ms 18868 KB Output is correct
36 Correct 167 ms 17380 KB Output is correct
37 Correct 253 ms 19348 KB Output is correct
38 Correct 265 ms 17392 KB Output is correct
39 Correct 431 ms 18604 KB Output is correct
40 Correct 582 ms 18336 KB Output is correct
41 Runtime error 32 ms 65536 KB Execution killed with signal 9
42 Halted 0 ms 0 KB -