Submission #388173

#	Time	Username	Problem	Language	Result	Execution time	Memory
388173		blue	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	682 ms	17988 KiB

dango_maker

#include <iostream>
using namespace std;

char grid[3000][3000];
int N, M;

bool vert(int i, int j)
{
    if(i == 0 || i == N-1) return 0;
    if(grid[i-1][j] != 'R') return 0;
    if(grid[i][j] != 'G') return 0;
    if(grid[i+1][j] != 'W') return 0;
    return 1;
}

bool horiz(int i, int j)
{
    if(j == 0 || j == M-1) return 0;
    if(grid[i][j-1] != 'R') return 0;
    if(grid[i][j] != 'G') return 0;
    if(grid[i][j+1] != 'W') return 0;
    return 1;
}

int main()
{
    cin >> N >> M;

    for(int i = 0; i < N; i++) for(int j = 0; j < M; j++) cin >> grid[i][j];

    int res = 0;

    int H, V;
    int H1, V1;

    for(int I = 0; I < N; I++)
    {
        H = 0;
        V = 0;
        for(int s = 0; I-s >= 0 && s < M; s++)
        {
            swap(H, H1);
            swap(V, V1);

            int i = I-s;
            int j = s;

            H = max(H1, V1);
            H = max(H, H1 + horiz(i, j));

            V = max(H1, V1);
            V = max(V, V1 + vert(i, j));
        }
        // cout << H << ' ' << V << '\n';
        res += max(H, V);
    }

    for(int J = 1; J < M; J++)
    {
        H = 0;
        V = 0;

        for(int s = 0; N-1-s >= 0 && J+s < M; s++)
        {
            swap(H, H1);
            swap(V, V1);

            int i = N-1-s;
            int j = J+s;

            H = max(H1, V1);
            H = max(H, H1 + horiz(i, j));

            V = max(H1, V1);
            V = max(V, V1 + vert(i, j));
        }
        // cout << H << ' ' << V << '\n';
        res += max(H, V);
    }

    cout << res << '\n';
}

• Subtask 1: 13 / 13
• Subtask 2: 20 / 20
• Subtask 3: 67 / 67