Submission #716201

#	Time	Username	Problem	Language	Result	Execution time	Memory
716201		penguin133	Dango Maker (JOI18_dango_maker)	C++17	13 / 100	1 ms	340 KiB

dango_maker

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, m, dp[3005][3005], fl[3005][3005], fr[3005][3005];
char G[3005][3005];
void solve(){
	cin >> n >> m;
	for(int i=1;i<=n;i++)for(int j=1;j<=m;j++)cin >> G[i][j];
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			fl[i][j] = fl[i][j-1];
			if(j >= 3 && G[i][j-1] == 'G' && ( (G[i][j] == 'W' && G[i][j-2] == 'R')))fl[i][j] = max(fl[i][j], fl[i][j-3] + 1);
			//cout << fl[i][j] << ' ';
		}
		///cout << '\n';
	}
	for(int i=1;i<=m;i++){
		for(int j=1;j<=n;j++){
			fr[j][i] = fr[j-1][i];
			if(j >= 3 && G[j-1][i] == 'G' && ((G[j][i] == 'W' && G[j-2][i] == 'R')))fr[j][i] = max(fr[j][i], fr[j-3][i] + 1);
			
		}
	}
	//for(int i=1;i<=n;i++)for(int j=1;j<=m;j++)cout << fr[i][j] << ' ';
	//cout << '\n';
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			dp[i][j] = max({dp[i][j], dp[i-1][j] + fl[i][j], dp[i][j-1] + fr[i][j]});
			//cout << dp[i][j] << ' ';
		}
		//cout << '\n';
	}
	cout << dp[n][m];
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message (stderr)

dango_maker.cpp:46:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   46 | main(){
      | ^~~~

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