Submission #977988

#	Time	Username	Problem	Language	Result	Execution time	Memory
977988		LOLOLO	Dango Maker (JOI18_dango_maker)	C++17	0 / 100	1 ms	348 KiB

dango_maker

#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
 
#define           f    first
#define           s    second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (int)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())
 
const int N = 2e3 + 100;
char mat[N][N];
int f[N * 4][3];

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

    int n, m;
    cin >> n >> m;

    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> mat[i][j];
        }
    }

    int ans = 0;
    for (int dig = 1; dig <= m + n; dig++) {
        int mn = max(1, dig - m), mx = max(1, dig - 1);
        for (int i = 0; i <= m + n; i++) 
            f[i][0] = f[i][1] = f[i][2] = f[i][3] = 0;

        for (int x = mn; x <= mx; x++) {
            int y = dig - x;
            if (mat[x][y] == 'G') {
                if (mat[x - 1][y] == 'R' && mat[x + 1][y] == 'W')
                    f[x][1] = max(f[x - 1][1], f[x - 1][0]) + 1;

                if (mat[x][y - 1] == 'R' && mat[x][y + 1] == 'W')
                    f[x][2] = max(f[x - 1][1], f[x - 1][0]) + 1;
            }

            f[x][0] = max({f[x - 1][0], f[x - 1][1], f[x - 1][2]});
        }

        ans += max({f[mx][0], f[mx][1], f[mx][2]});
    }

    cout << ans << '\n';

    return 0;
}

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:45:49: warning: array subscript 3 is above array bounds of 'int [3]' [-Warray-bounds]
   45 |             f[i][0] = f[i][1] = f[i][2] = f[i][3] = 0;
      |                                                 ^

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