Submission #19488484

---

Source Code Expand

#include <bits/stdc++.h>
#include <atcoder/all>
#define INF 1e9
#define INFLL 1ull<<60u
using namespace std;

#define REPR(i,n) for(int i=(n); i >= 0; --i)
#define FOR(i, m, n) for(int i = (m); i < (n); ++i)
#define REP(i, n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define ALL(a)  (a).begin(),(a).end()
#define endl "\n"

template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
typedef long long ll;

using vi = vector<int>;
using vvi = vector<vi>;
using vpii = vector<pair<int,int>>;

using mi = atcoder::modint998244353;

void solve() {
    int H,W,K; cin >> H >> W >> K;
    // R,D,X 0,1,2
    vector<vector<mi>> dp(H,vector<mi>(W,0));
    vector<vector<char>> grid(H,vector<char>(W,'.'));

    REP(_,K) {
        int h,w;
        char c;
        cin >> h >> w >> c;

        h--; w--;
        grid[h][w] = c;
    }

    using Position = pair<int,int>;
    dp[0][0] = mi(3).pow(H*W - K);

    auto r = mi(2) * mi(3).inv();

    REP(h,H) REP(w,W) {
            if (grid[h][w] == 'D' && h + 1 < H) {
                dp[h+1][w] += dp[h][w];
                continue;
            } else if (grid[h][w] == 'R' && w + 1 < W) {
                dp[h][w+1] += dp[h][w];
                continue;
            } else if (grid[h][w] == 'X') {
                if(h + 1 < H) dp[h+1][w] += dp[h][w];
                if (w + 1 < W) dp[h][w+1] += dp[h][w];
                continue;
            } else if (grid[h][w] == '.') {
                if (h+1 < H) dp[h+1][w] += dp[h][w] * r;
                if (w+1 < W) dp[h][w+1] += dp[h][w] * r;

            }
        }

    cout << (dp[H-1][W-1]).val() << endl;

}

int main() {
    solve();
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘void solve()’:
./Main.cpp:38:11: warning: typedef ‘using Position = struct std::pair<int, int>’ locally defined but not used [-Wunused-local-typedefs]
   38 |     using Position = pair<int,int>;
      |           ^~~~~~~~

Judge Result