제출 #823595

#제출 시각아이디문제언어결과실행 시간메모리
823595svenDango Maker (JOI18_dango_maker)C++17
13 / 100
1 ms340 KiB
#include <bits/stdc++.h> using namespace std; const int MAXN = 3 * 1000 + 10; char tab[MAXN][MAXN]; bool peut[MAXN][MAXN][2]; // 0 -> droite // 1 -> bas // int mod3(int n) { return ((n % 3) + 3) % 3; } int main() { ios::sync_with_stdio(false); int N , M; cin >> N >> M; for (int i = 0 ; i < N ; i++) { for (int j = 0 ; j < M ; j++) { cin >> tab[i][j]; } } for (int i = 0 ; i < N ; i++) { for (int j = 0 ; j < M ; j++) { if (j + 2 < M && tab[i][j] == 'R' && tab[i][j + 1] == 'G' && tab[i][j + 2] == 'W') { peut[i][j][0] = true; } if (i + 2 < N && tab[i][j] == 'R' && tab[i + 1][j] == 'G' && tab[i + 2][j] == 'W') { peut[i][j][1] = true; } } } int sol = 0; int i0 = 0; int j0 = 0; while (j0 < M && i0 < N) { int nb[3]; nb[0] = nb[1] = nb[2] = 0; int ofs = 0; int i = i0; int j = j0; while (i < N && j >= 0) { int valb = max(nb[ofs] , max(nb[mod3(ofs - 1)] , nb[mod3(ofs - 2)])) + 1; int vald = nb[ofs] + 1; if (peut[i][j][0]) { nb[mod3(ofs - 2)] = max(nb[mod3(ofs - 2)] , vald); } if (peut[i][j][1]) { nb[ofs] = valb; } i++; j--; ofs = mod3(ofs + 1); } int aj = max(nb[0] , max(nb[1] , nb[2])); sol += aj; j0++; if (j0 == M) { i0++; j0 = M - 1; } } cout<<sol<<endl; }
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