Submission #939710

#	Time	Username	Problem	Language	Result	Execution time	Memory
939710		mansur	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	218 ms	87948 KiB

dango_maker

//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")

#include<bits/stdc++.h>	

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()                 
#define sz(a) (int)a.size()
#define s second
#define f first
 
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
     
vector<pii> rid = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}};
vector<pii> dir = {{-1, -1}, {-1, 1}, {1, -1}, {1, 1}};
 
const int N = 1e6 + 1, mod = 1e9 + 7;

const ll inf = 1e18;
 
double eps = 1e-15;
                                                
bool flg = 0;

void slv() {
	int n, m;
	cin >> n >> m;
	char c[n + 1][m + 1];
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> c[i][j];
		}
	}
	int dp[n + 1][m + 1][2], mx[n + m + 1];
	memset(dp, 0, sizeof(dp));
	memset(mx, 0, sizeof(mx));
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			int v = max(dp[i][j][0], dp[i][j][1]);
			mx[i + j] = max(mx[i + j], v);
			if (i < n && j > 1) {
				dp[i + 1][j - 1][0] = max(dp[i + 1][j - 1][0], dp[i][j][0]);
				dp[i + 1][j - 1][1] = max(dp[i + 1][j - 1][1], dp[i][j][1]);
			}
			if (j + 2 <= m && c[i][j] == 'R' && c[i][j + 1] == 'G' && c[i][j + 2] == 'W') {
				if (i < n && j > 1) {
					dp[i + 1][j - 1][0] = max(dp[i + 1][j - 1][0], dp[i][j][0] + 1);
					dp[i + 1][j - 1][1] = max(dp[i + 1][j - 1][1], dp[i][j][0] + 1);
				}
				mx[i + j] = max(mx[i + j], dp[i][j][0] + 1);
			}
			if (i + 2 <= n && c[i][j] == 'R' && c[i + 1][j] == 'G' && c[i + 2][j] == 'W') {
				if (j > 3 && i + 3 <= n) 
					dp[i + 3][j - 3][0] = max(dp[i + 3][j - 3][0], dp[i][j][1] + 1);
				if (i < n && j > 1)
					dp[i + 1][j - 1][1] = max(dp[i + 1][j - 1][1], dp[i][j][1] + 1);
				mx[i + j] = max(mx[i + j], dp[i][j][1] + 1);
			}
		}
	}
	int ans = 0;
	for (int i = 1; i <= n + m; i++) {
	    //cout << mx[i] << ' ';
		ans += mx[i];
	}
	cout << ans;
}                                                                           
 
main() {
	//freopen("rsq.in", "r", stdin);                                                                                     
	//freopen("rsq.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(0);	                                                                                       
	cin.tie(0);
	int tp = 1;
	if (flg) cin >> tp;
	while (tp--) {
		//cout << "Case #" << cur++ << ": ";
		slv();
	}
}
//wenomechainsama                                              

Compilation message (stderr)

dango_maker.cpp:75:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   75 | main() {
      | ^~~~

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