Submission #991141

#	Time	Username	Problem	Language	Result	Execution time	Memory
991141		gmroh06	JOI 문장 (JOI14_ho_t1)	C++17	100 / 100	26 ms	42092 KiB

2014_ho_t1

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using pll = pair<ll, ll>;

inline void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
}

ll n, m, dp[1010][1010][5], ans, h[4][4], p;
char s[1010][1010], joi[3][3];
ll dx[] = {0, 0, -1, -1}, dy[] = {0, -1, 0, -1};

int main() {
    fastio();

    cin >> m >> n;

    for (ll i = 0; i < m; i++) {
        cin >> s[i];
    }

    cin >> joi[0] >> joi[1];

    for (ll i = 0; i < 2; i++) {
        for (ll j = 0; j < 2; j++) {
            h[i][j] = 2 * (joi[i][j] == 'I') + (joi[i][j] == 'O');
        }
    }

    for (ll i = 1; i < m; i++) {
        for (ll j = 1; j < n; j++) {
            ll cnt = 0, x, y;

            for (ll k = 0; k < 4; k++) {
                ll nx = i + dx[k], ny = j + dy[k];

                if (joi[1 + dx[k]][1 + dy[k]] == s[nx][ny]) {
                    cnt++;
                } else {
                    x = nx, y = ny;
                }
            }

            if (cnt == 4) {
                ans++;

                for (ll k = 0; k < 4; k++) {
                    ll nx = i + dx[k], ny = j + dy[k];

                    for (ll l = 0; l < 3; l++) {
                        if (l != h[1 + dx[k]][1 + dy[k]]) {
                            dp[nx][ny][l]--;
                        }
                    }
                }
            } else if (cnt == 3) {
                dp[x][y][h[x - i + 1][y - j + 1]]++;
            }
        }
    }

    for (ll i = 0; i < m; i++) {
        for (ll j = 0; j < n; j++) {
            for (ll k = 0; k < 3; k++) {
                p = max(p, dp[i][j][k]);
            }
        }
    }

    cout << ans + p;

    return 0;
}

Compilation message (stderr)

2014_ho_t1.cpp: In function 'int main()':
2014_ho_t1.cpp:61:50: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   61 |                 dp[x][y][h[x - i + 1][y - j + 1]]++;
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
2014_ho_t1.cpp:61:50: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 30 / 30
• Subtask 2: 70 / 70