oj.uz

Submission #691963

# Submission time Handle Problem Language Result Execution time Memory
691963 2023-02-01T03:37:06 Z Neos Selotejp (COCI20_selotejp) C++14
110 / 110
 45 ms 40796 KB 
#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define sz(x) (int)x.size()
#define M(x) (1ll << (x))
#define getBit(x, i) ((x) >> (i) & 1)
#define rep(i, b, e) for (ll i = (b); i <= (e); i++)
#define rrep(i, b, e) for (ll i = (b); i >= (e); i--)

typedef long long ll;
typedef pair<ll, ll> ii;

template <class T>
bool minimize(T &a, const T &b) {
    if(a > b) {a = b; return 1;}
    return 0;
}
template <class T>
bool maximize(T &a, const T &b) {
    if(a < b) {a = b; return 1;}
    return 0;
}

const int N = 1e3 + 7, M = 10;
int n, m, a[N][M + 2], f[N][M][1 << M];
int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m;
    rep(i, 1, n) {
        rep(j, 0, m - 1) {
            char c; cin >> c;
            if (c == '#') a[i][j] = 1;
        }
    }

    memset(f, 0x3f, sizeof f);
    int ans = 2e9;
    rep(j, 0, (1 << m) - 1) f[0][m - 1][j] = 0;
    rep(i, 1, n) rep(j, 0, m - 1) rep(k, 0, (1 << m) - 1) {
        if (a[i][j]) {
            // verticle
            if (getBit(k, j)) {
                if (j == 0) {
                    minimize(f[i][j][k], f[i - 1][m - 1][k ^ M(j)] + 1);
                    if (a[i - 1][j]) minimize(f[i][j][k], f[i - 1][m - 1][k]);
                }
                else {
                    minimize(f[i][j][k], f[i][j - 1][k ^ M(j)] + 1);
                    if (a[i - 1][j]) minimize(f[i][j][k], f[i][j - 1][k]);
                }
            } else { // horizontal
                if (j == 0) {
                    f[i][j][k] = min(f[i - 1][m - 1][k ^ M(j)], f[i - 1][m - 1][k]) + 1;
                }
                else {
                    if (!a[i][j - 1] || getBit(k, j - 1)) {
                        f[i][j][k] = min(f[i][j - 1][k], f[i][j - 1][k ^ M(j)]) + 1;
                    }
                    if (a[i][j - 1] && !getBit(k, j - 1))
                        f[i][j][k] = min(f[i][j - 1][k ^ M(j)], f[i][j - 1][k]);
                }
            }
        }
        else {
            if (j == 0) f[i][j][k] = min(f[i - 1][m - 1][k], f[i - 1][m - 1][k ^ M(j)]);
            else f[i][j][k] = min(f[i][j - 1][k], f[i][j - 1][k ^ M(j)]);
        }
        if (i == n && j == m - 1) minimize(ans, f[i][j][k]);
    }
    cout << ans;
}

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 40592 KB Output is correct
2 Correct 38 ms 40724 KB Output is correct
3 Correct 21 ms 40660 KB Output is correct
4 Correct 26 ms 40660 KB Output is correct
5 Correct 37 ms 40660 KB Output is correct
6 Correct 45 ms 40660 KB Output is correct
7 Correct 36 ms 40612 KB Output is correct
8 Correct 33 ms 40652 KB Output is correct
9 Correct 39 ms 40720 KB Output is correct
10 Correct 37 ms 40796 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 40660 KB Output is correct
2 Correct 19 ms 40660 KB Output is correct
3 Correct 17 ms 40660 KB Output is correct
4 Correct 18 ms 40652 KB Output is correct
5 Correct 17 ms 40612 KB Output is correct
6 Correct 18 ms 40672 KB Output is correct
7 Correct 18 ms 40628 KB Output is correct
8 Correct 18 ms 40660 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 40592 KB Output is correct
2 Correct 38 ms 40724 KB Output is correct
3 Correct 21 ms 40660 KB Output is correct
4 Correct 26 ms 40660 KB Output is correct
5 Correct 37 ms 40660 KB Output is correct
6 Correct 45 ms 40660 KB Output is correct
7 Correct 36 ms 40612 KB Output is correct
8 Correct 33 ms 40652 KB Output is correct
9 Correct 39 ms 40720 KB Output is correct
10 Correct 37 ms 40796 KB Output is correct
11 Correct 18 ms 40660 KB Output is correct
12 Correct 19 ms 40660 KB Output is correct
13 Correct 17 ms 40660 KB Output is correct
14 Correct 18 ms 40652 KB Output is correct
15 Correct 17 ms 40612 KB Output is correct
16 Correct 18 ms 40672 KB Output is correct
17 Correct 18 ms 40628 KB Output is correct
18 Correct 18 ms 40660 KB Output is correct
19 Correct 18 ms 40684 KB Output is correct
20 Correct 22 ms 40692 KB Output is correct
21 Correct 27 ms 40740 KB Output is correct
22 Correct 38 ms 40716 KB Output is correct
23 Correct 33 ms 40628 KB Output is correct
24 Correct 35 ms 40720 KB Output is correct
25 Correct 42 ms 40736 KB Output is correct
26 Correct 41 ms 40724 KB Output is correct
27 Correct 43 ms 40684 KB Output is correct
28 Correct 44 ms 40656 KB Output is correct