Submission #678643

#	Time	Username	Problem	Language	Result	Execution time	Memory
678643		jahsdwaijsd	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	327 ms	36812 KiB

dango_maker

/*
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#pragma GCC optimize("unroll-loops")
*/
#include <bits/stdc++.h>
#define taskname "bai3"
#define all(x) x.begin(), x.end()
#define ll long long
#define ull unsigned ll
#define ld long double
#define pb push_back
#define ff first
#define ss second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
using namespace std;
using cd = complex<double>;

const int mxN = 3e3 + 5;
const int mod = 1e9 + 7;
const ll oo = 1e18;

int n, m, a[mxN][mxN];

void solve() {
    cin >> n >> m;
    for(int i = 1; i <= n; ++i) {
        for(int j = 1; j <= m; ++j) {
            char c; cin >> c;
            if(c == 'R') a[i][j] = 0;
            else if(c == 'G') a[i][j] = 1;
            else a[i][j] = 2;
            //cout << a[i][j] << " ";
        }
        //cout << "\n";
    }
    int ans = 0;
    for(int sum = 2; sum <= n + m; ++sum) {
        int dp[mxN][2], cnt = 0;
        memset(dp, 0, sizeof dp);
        for(int i = 1; i <= n; ++i) {
            int j = sum - i;
            if(j > m || j < 1)
                continue;
            if(i < 3)
                dp[i][0] = 0;
            else {
                int tmp = 0;
                if(a[i][j] == 2 && a[i - 1][j] == 1 && a[i - 2][j] == 0)
                    tmp = 1;
                dp[i][0] = max(dp[i - 1][0], dp[i - 3][1]) + tmp;
            }
            if(j < 3) {
                dp[i][1] = dp[i - 1][1];
                if(i > 3)
                    dp[i][1] = max(dp[i][1], dp[i - 3][0]);
            }
            else {
                int tmp = 0;
                if(a[i][j] == 2 && a[i][j - 1] == 1 && a[i][j - 2] == 0)
                    tmp = 1;
                dp[i][1] = max(dp[i - 1][0], dp[i - 1][1]) + tmp;
            }
            cnt = max({cnt, dp[i][0], dp[i][1]});
        }
        ans += cnt;
    }
    cout << ans << "\n";
}

signed main() {
#ifdef CDuongg
    freopen("bai3.inp", "r", stdin);
    freopen("bai3.out", "w", stdout);
    auto start = chrono::high_resolution_clock::now();
#endif

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1; //cin >> t;
    while(t--) solve();

#ifdef CDuongg
    auto end = chrono::high_resolution_clock::now();
    cout << "\n"; for(int i = 1; i <= 100; ++i) cout << '=';
    cout << "\nExecution time: " << chrono::duration_cast<chrono::milliseconds> (end - start).count() << "[ms]" << endl;
#endif

}

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