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답안 #377450

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
377450 2021-03-14T08:31:43 Z NONAME Selotejp (COCI20_selotejp) C++17
110 / 110
 31 ms 504 KB 
#include <bits/stdc++.h>
using namespace std;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

int_fast32_t n, m;
int_fast32_t dp[2][1 << 11];
char a[1000][10];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            cin >> a[i][j];
        }
    }

    int tp = 0;
    for (int i : {0, 1}) {
        for (int msk = 0; msk < (1 << m); ++msk) {
            dp[i][msk] = 1e9;
        }
    }
    dp[0][0] = 0;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            int nt = tp ^ 1;
            for (int msk = 0; msk < (1 << m); ++msk) {
                if (!((msk >> j) & 1)) {
                    int c = 0;
                    if ((a[i][j] == '#') && (!j || (a[i][j - 1] == '.') || ((msk >> (j - 1)) & 1))) {
                        c = 1;
                    }
                    dp[nt][msk] = min(dp[tp][msk], dp[tp][msk ^ (1 << j)]) + c;
                } else {
                    if (a[i][j] == '.') {
                        dp[nt][msk] = 1e9;
                    } else {
                        dp[nt][msk] = min(dp[tp][msk], dp[tp][msk ^ (1 << j)] + 1);
                    }
                }
            }
            tp ^= 1;
        }
    }

    int_fast32_t ans = 1e9;
    for (int msk = 0; msk < (1 << m); ++msk) {
        ans = min(ans, dp[tp][msk]);
    }
    cout << ans << "\n";

    return 0;
}

Subtask #1
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 18 ms 364 KB Output is correct
3 Correct 4 ms 364 KB Output is correct
4 Correct 9 ms 364 KB Output is correct
5 Correct 19 ms 364 KB Output is correct
6 Correct 19 ms 364 KB Output is correct
7 Correct 18 ms 364 KB Output is correct
8 Correct 21 ms 364 KB Output is correct
9 Correct 18 ms 364 KB Output is correct
10 Correct 20 ms 364 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 18 ms 364 KB Output is correct
3 Correct 4 ms 364 KB Output is correct
4 Correct 9 ms 364 KB Output is correct
5 Correct 19 ms 364 KB Output is correct
6 Correct 19 ms 364 KB Output is correct
7 Correct 18 ms 364 KB Output is correct
8 Correct 21 ms 364 KB Output is correct
9 Correct 18 ms 364 KB Output is correct
10 Correct 20 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 504 KB Output is correct
20 Correct 5 ms 364 KB Output is correct
21 Correct 10 ms 364 KB Output is correct
22 Correct 17 ms 364 KB Output is correct
23 Correct 18 ms 492 KB Output is correct
24 Correct 18 ms 364 KB Output is correct
25 Correct 20 ms 364 KB Output is correct
26 Correct 20 ms 492 KB Output is correct
27 Correct 27 ms 384 KB Output is correct
28 Correct 31 ms 436 KB Output is correct