Submission #1050120

#	Time	Username	Problem	Language	Result	Execution time	Memory
1050120		vjudge1	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	228 ms	124500 KiB

dango_maker

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;

#define speed ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define russian setlocale(LC_ALL,"Russian_Russia.20866");
#define file freopen("onlyone.in", "r", stdin), freopen("onlyone.out", "w", stdout);
#define ll long long
//#define int long long
#define ull unsigned long long
#define ld long double
#define pll pair<ll, ll>
#define pii pair<int, int>
#define all(s) s.begin(), s.end()
#define pb push_back
#define ins insert
#define mp make_pair
#define sz(x) x.size()
#define F first
#define S second
#define lb lower_bound
#define ub upper_bound
#define mem(x) memset(x, 0, sizeof(x))
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll N = 3010;
const ll M = 600000;
const ll block = 316;
const ll mod = 1e9 + 7;
const ll P = 263;
const ld pi = acos(-1);
const ll inf = 1e9;

ll add(ll a, ll b) {
    if(a + b < 0) return a + b + mod;
    if(a + b >= mod) return a + b - mod;
    return a + b;
}

ll sub(ll a, ll b) {
    return (a - b + mod) % mod;
}

ll mul(ll a, ll b) {
    return a * 1LL * b % mod;
}

ll binpow(ll a, ll n) {
    ll res = 1;
    while(n) {
        if (n & 1) res = mul(res, a);
        a = mul(a, a);
        n >>= 1;
    }
    return res;
}

ll inv(ll x) {
    return binpow(x, mod - 2);
}
int n, m;
char a[N][N];
string order = "RGW";
pii pos[N + N];
int dp[3][N][N];//0 - max both, 1 - horizontal, 2 - vetical
bool check(int x, int y) {
    return (1 <= x && x <= n && 1 <= y && y <= m);
}
int horizontal(int i, int j) {
    int ok = 1;
    for(int k = 0; k < 3; k++) {
        ok &= (check(i, j + k - 1) && a[i][j + k - 1] == order[k]);
    }
    return ok;
}
int vertical(int i, int j) {
    int ok = 1;
    for(int k = 0; k < 3; k++) {
        ok &= (check(i + k - 1, j) && a[i + k - 1][j] == order[k]);
    }
    return ok;
}
void solve() {
    cin >> n >> m;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            cin >> a[i][j];
            pos[i + j] = {i, j};
        }
    }
    dp[0][0][0] = dp[1][0][0] = dp[2][0][0] = 0;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= m; j++) {
            dp[0][i][j] = max({dp[0][i][j], dp[1][i - 1][j + 1], dp[2][i - 1][j + 1]});
            dp[1][i][j] = max(dp[0][i][j], dp[1][i - 1][j + 1] + horizontal(i, j));
            dp[2][i][j] = max(dp[0][i][j], dp[2][i - 1][j + 1] + vertical(i, j));
        }
    }
    int ans = 0;
    // for(int x = 1; x <= n; x++) {
    //     for(int y = 1; y <= m; y++) {
    //         ans += max({dp[0][x][y], dp[1][x][y], dp[2][x][y]});
    //     }
    // }
    // cout << ans << '\n';
    // ans = 0;
    for(int i = 1; i <= n + m; i++) {
        auto [x, y] = pos[i];
        // cout << "(" << x << ',' << y << "): ";
        // cout << dp[0][x][y] << ' ' << dp[1][x][y] << ' ' << dp[2][x][y] << '\n';
        ans += max({dp[0][x][y], dp[1][x][y], dp[2][x][y]});
    }
    cout << ans << '\n';
}
signed main() {
    speed;
    //file
    int test = 1;
    //cin >> test;
    while(test--) {
        solve();
    }
}

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