Submission #1104871

#	Time	Username	Problem	Language	Result	Execution time	Memory
1104871		Champ_Naman	Growing Vegetable is Fun 3 (JOI19_ho_t3)	C++17	0 / 100	528 ms	971804 KiB

joi2019_ho_t3

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define nl '\n'

int dp[401][401][401][3];

inline void solve(){
	int n;
	cin>>n;
	string s;
	cin>>s;
	s = " "+s;

	int p[3][n+1], c[3];
	for(int l=0; l<3; l++) for(int i=1; i<=n; i++) p[l][i] = -1;
	p[0][0] = p[1][0] = p[2][0] = c[0] = c[1] = c[2] = 0;

	for(int i=1; i<=n; i++){
		if(s[i] == 'R') p[0][++c[0]] = i;
		else if(s[i] == 'G') p[1][++c[1]] = i;
		else p[2][++c[2]] = i;
	}

	for(int r=0; r<=n; r++) for(int g=0; g<=n; g++) for(int l=0; l<3; l++) dp[0][r][g][l] = 1e9;
	for(int l=0; l<3; l++) dp[0][0][0][l] = 0;

	for(int i=1; i<=n; i++){
		for(int r=0; r<=i; r++){
			for(int g=0; g<=i; g++){
				int y = i - r - g;

				for(int l=0; l<3; l++){
					if(y < 0 or (l == 0 ? r : (l == 1 ? g : y)) == 0){
						dp[i][r][g][l] = 1e9;
						continue;
					}

					dp[i][r][g][l] = 1e9;
					if(l == 0) dp[i][r][g][l] = min(dp[i-1][r-1][g][1], dp[i-1][r-1][g][2]) + max(0LL, p[0][r] - i);
					if(l == 1) dp[i][r][g][l] = min(dp[i-1][r][g-1][0], dp[i-1][r][g-1][2]) + max(0LL, p[1][g] - i);
					if(l == 2) dp[i][r][g][l] = min(dp[i-1][r][g][0], dp[i-1][r][g][1]) + max(0LL, p[2][y] - i);
				}
			}
		}
	}

	int ans = min({dp[n][c[0]][c[1]][0], dp[n][c[0]][c[1]][1], dp[n][c[0]][c[1]][2]});
	cout<<(ans >= 1e9 ? -1 : ans)<<nl;
}

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);cout.tie(NULL);

	int t = 1;
	//cin>>t;
	while(t--) solve();

	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 55
• Subtask 3: 0 / 15
• Subtask 4: 0 / 25