Submission #260320

#	Time	Username	Problem	Language	Result	Execution time	Memory
260320		AM1648	Dango Maker (JOI18_dango_maker)	C++17	0 / 100	1 ms	640 KiB

dango_maker

/* be name khoda */

// #define long_enable
#include <iostream>
#include <algorithm>
#include <cstring>
#include <numeric>
#include <vector>
#include <fstream>
#include <set>
#include <map>
using namespace std;

#ifdef long_enable
typedef long long int ll;
#else
typedef int ll;
#endif

typedef pair<ll, ll> pii;
typedef pair<pii, ll> ppi;
typedef pair<ll, pii> pip;
typedef vector<ll> vi;
typedef vector<pii> vpii;

#define forifrom(i, s, n) for (ll i = s; i < n; ++i)
#define forirto(i, n, e) for (ll i = (n) - 1; i >= e; --i)
#define fori(i, n) forifrom (i, 0, n)
#define forir(i, n) forirto (i, n, 0)

#define F first
#define S second
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define smin(a, b) a = min(a, (b))
#define smax(a, b) a = max(a, (b))

#define debug(x) cout << #x << " -> " << (x) << endl
#define debug2(x, y) cout << #x << ' ' << #y << " -> " << (x) << ' ' << (y) << endl
#define debug3(x, y, z) cout << #x << ' ' << #y << ' ' << #z << " -> " << (x) << ' ' << (y) << ' ' << (z) << endl
#define debug4(x, y, z, t) cout << #x << ' ' << #y << ' ' << #z << ' ' << #t << " -> " << (x) << ' ' << (y) << ' ' << (z) << ' ' << (t) << endl
#define debuga(x, n) cout << #x << " -> "; fori (i1_da, n) { cout << (x)[i1_da] << ' '; } cout << endl
#define debugaa(x, n, m) cout << #x << " ->\n"; fori (i1_daa, n) { fori (i2_daa, m) { cout << (x)[i1_daa][i2_daa] << ' '; } cout << '\n'; } cout << endl

const ll MOD = 1000000007;
const ll INF = 2000000000;
const long long BIG = 1446803456761533460LL;

#define XL (x << 1)
#define XR (XL | 1)
#define MD ((l + r) >> 1)
#define Add(a, b) a = ((a) + (b)) % MOD
#define Mul(a, b) a = (1LL * (a) * (b)) % MOD

// -----------------------------------------------------------------------

const ll maxn = 3010;

ll n, m;
string A[maxn];
ll G[maxn][maxn];
vi D[maxn * 2];
ll dp[maxn][3];

ll calc(vi D) {
    ll s = D.size();
    memset(dp, 0, sizeof dp);
    fori (i, s) {
        dp[i + 1][0] = max(dp[i][0], max(dp[i][1], dp[i][2]));
        if (D[i] & 1) {
            dp[i + 1][1] = max(dp[i][0], dp[i][2]) + 1;
        }    
        if (D[i] & 2) {
            dp[i + 1][2] = max(dp[i][0], dp[i][1]) + 1;
        }
    }
    return max(dp[s][0], max(dp[s][1], dp[s][2]));
}

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

    cin >> n >> m;
    A[0] = A[n + 1] = string(m + 2, '.');
    fori (i, n) {
        cin >> A[i + 1];
        A[i + 1] = '.' + A[i + 1] + '.';
    }
    forifrom (i, 1, n + 1) {
        forifrom (j, 1, m + 1) {
            if (A[i][j] == 'G') {
                if (A[i][j - 1] == 'R' && A[i][j + 1] == 'W') G[i][j] ^= 1;
                if (A[i - 1][j] == 'R' && A[i + 1][j] == 'W') G[i][j] ^= 2;
            }
        }
    }
    forifrom (i, 1, n + 1) {
        forifrom (j, 1, m + 1) {
            D[i + j - 2].eb(G[i][j]);
        }
    }
    ll ans = 0;
    fori (i, n + m - 1) {
        ans += calc(D[i]);
    }
    cout << ans << '\n';

}

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