Submission #762531

#	Time	Username	Problem	Language	Result	Execution time	Memory
762531		stefanneagu	Dango Maker (JOI18_dango_maker)	C++17	13 / 100	1 ms	340 KiB

dango_maker

#include <iostream> 
#include <vector>
#include <set>
#include <algorithm>

using namespace std;

const int nmax = 3007;

char mat[nmax][nmax];
int jos[nmax][nmax], dr[nmax][nmax], f[nmax][nmax];

int32_t main() {
    int n, m, ans = 0;
    cin >> n >> m;
    for(int i = 1; i <= n; i ++) {
        for(int j = 1; j <= m; j ++) {
            cin >> mat[i][j];
        }
    }
    for(int i = 1; i <= n - 2; i ++) {
        for(int j = 1; j <= m; j ++) {
            if(mat[i][j] == 'R' && mat[i + 1][j] == 'G' && mat[i + 2][j] == 'W') {
                jos[i][j] = 1;
                jos[i + 1][j] = 2;
                jos[i + 2][j] = 3;
            }
        }
    }
    for(int i = 1; i <= n; i ++) {
        for(int j = 1; j <= m - 2; j ++) {
            if(mat[i][j] == 'R' && mat[i][j + 1] == 'G' && mat[i][j + 2] == 'W') {
                dr[i][j] = 1;
                dr[i][j + 1] = 2;
                dr[i][j + 2] = 3; 
            }
        }
    }
    for(int i = 1; i <= n; i ++) {
        for(int j = 1; j <= m; j ++) {
            if(!f[i][j]) {
                int cnt = 0, ult = 0;
                if(jos[i][j] == 1 && f[i + 1][j] == 0 && f[i + 2][j] == 0) {
                    // numaram cate blocam
                    if(dr[i][j] == 1) cnt ++;
                    if(dr[i + 1][j] == 1) cnt ++;
                    if(dr[i + 2][j] == 1) cnt ++; 
                    if(dr[i][j - 1] == 1) cnt ++;
                    if(dr[i + 1][j - 1] == 1) cnt ++;
                    if(dr[i + 2][j - 1] == 1) cnt ++; 
                    if(j > 1) { 
                        if(dr[i][j - 2] == 1) cnt ++;
                        if(dr[i + 1][j - 2] == 1) cnt ++;
                        if(dr[i + 2][j - 2] == 1) cnt ++; 
                    }
                } else {
                    cnt = 1e9;
                }
                ult = cnt;
                cnt = 0;
                if(dr[i][j] == 1 && f[i][j + 1] == 0 && f[i][j + 2] == 0) {
                    if(jos[i][j] == 1) cnt ++;
                    if(jos[i][j + 1] == 1) cnt ++;
                    if(jos[i][j + 2] == 1) cnt ++;
                    if(jos[i - 1][j] == 1) cnt ++;
                    if(jos[i - 1][j + 1] == 1) cnt ++;
                    if(jos[i - 1][j + 2] == 1) cnt ++;
                    if(i > 1) {
                        if(jos[i - 2][j] == 1) cnt ++;
                        if(jos[i - 2][j + 1] == 1) cnt ++;
                        if(jos[i - 2][j + 2] == 1) cnt ++;
                    }
                } else {
                    cnt = 1e9;
                }
                if(cnt < ult && cnt != 1e9) {
                    ans ++;
                    f[i][j] = 1;
                    f[i][j + 1] = 1;
                    f[i][j + 2] = 1;
                } else if(ult != 1e9) {
                    ans ++;
                    f[i][j] = 1;
                    f[i + 1][j] = 1;
                    f[i + 2][j] = 1;
                }
            }
        }
    }
    cout << ans;
    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 20
• Subtask 3: 0 / 67