oj.uz

Submission #227537

# Submission time Handle Problem Language Result Execution time Memory
227537 2020-04-27T18:03:23 Z MohamedAhmed04 Growing Vegetable is Fun 3 (JOI19_ho_t3) C++14
0 / 100
 500 ms 1040632 KB 
#include <bits/stdc++.h>

using namespace std ;

const int MAX = 400 + 5 ;

int arr[MAX] ;
string s ;
int dp[MAX][MAX][MAX][4] , cnt[3][MAX] , occ[3][MAX] ;
int n ;

int solve(int idx , int cnt1 , int cnt2 , int cnt3 , int prv)
{
	if(idx == n)
		return 0 ;
	int &ret = dp[idx][cnt1][cnt2][prv] ;
	if(ret != -1)
		return ret ;
	ret = MAX ;
	for(int i = 0 ; i <= 2 ; ++i)
	{
		if(i == prv)
			continue ;
		int to = -1 ;
		if(i == 0)
			to = occ[0][cnt1] ;
		if(i == 1)
			to = occ[1][cnt2] ;
		if(i == 2)
			to = occ[2][cnt3] ;
		if(to == -1)
			continue ;
		int cost = max(0 , cnt[0][to] - cnt1) + max(0 , cnt[1][to] - cnt2) + max(0 , cnt[2][to] - cnt3) ;
		if(i == 0)
			ret = min(ret , solve(idx+1 , cnt1+1 , cnt2 , cnt3 , i) + cost) ;
		if(i == 1)
			ret = min(ret , solve(idx+1 , cnt1 , cnt2+1 , cnt3 , i) + cost) ;
		if(i == 2)
			ret = min(ret , solve(idx+1 , cnt1 , cnt2 , cnt3+1 , i) + cost) ;
	}
	return ret ;
}

int main()
{
	memset(occ , -1 , sizeof(occ)) ;
	memset(dp , -1 , sizeof(dp)) ;
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n ;
	cin>>s ;
	int cnt1 = 0 , cnt2 = 0 , cnt3 = 0 ;
	for(int i = 0 ; i < n ; ++i)
	{
		cnt[0][i] = cnt1 , cnt[1][i] = cnt2 , cnt[2][i] = cnt3 ;
		if(s[i] == 'R')
			occ[0][cnt1++] = i ;
		else if(s[i] == 'G')
			occ[1][cnt2++] = i ;
		else
			occ[2][cnt3++] = i ;
	}
	int ans = solve(0 , 0 , 0 , 0 , 3) ;
	if(ans > n)
		ans = -1 ;
	return cout<<ans<<"\n" , 0 ;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Execution timed out 511 ms 1040632 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 55.0

# Verdict Execution time Memory Grader output
1 Execution timed out 511 ms 1040632 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Execution timed out 511 ms 1040376 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Execution timed out 511 ms 1040632 KB Time limit exceeded
2 Halted 0 ms 0 KB -