Submission #542685

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
542685	2022-03-27 13:36:14	Stickfish	Nautilus (BOI19_nautilus)	C++17	100 / 100	288 ms	1100 KiB

nautilus

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#include <iostream>
#include <bitset>
using namespace std;
const int MAXN = 501;
const int SZ = MAXN * MAXN;
bitset<SZ> empty_cell;
bitset<SZ> move_west;
bitset<SZ> move_east;
bitset<SZ> move_south;
bitset<SZ> ans;
signed main() {
    int r, c, m;
    cin >> r >> c >> m;
    for (int i = 0; i < r; ++i) {
        for (int j = 0; j < c; ++j) {
            char ch;
            cin >> ch;
            empty_cell[i * c + j] = (ch == '.');
            if (j)
                move_west[i * c + j] = empty_cell[i * c + j] & empty_cell[i * c + j - 1];
        }
    }
    for (int i = 0; i < r; ++i) {
        for (int j = 0; j < c; ++j) {
            if (j + 1 < c)
                move_east[i * c + j] = empty_cell[i * c + j] & empty_cell[i * c + j + 1];
            if (i + 1 < r)
                move_south[i * c + j] = empty_cell[i * c + j] & empty_cell[i * c + j + c];
 
 
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• Subtask 1: 29 / 29
• Subtask 2: 37 / 37
• Subtask 3: 34 / 34