Submission #103385

#	Time	Username	Problem	Language	Result	Execution time	Memory
103385		Berted	Miners (IOI07_miners)	C++14	100 / 100	226 ms	640 KiB

miners

#include <iostream>
using namespace std;
int n,ar[2][4][4][4][4]={},mx=1;string s;
int ts(char a)
{
	if (a=='M') {return 1;}
	else if (a=='B') {return 2;}
	else {return 3;}
}
int hm(int a,int b,int c)
{
	bool mp[4]={};int to=0;
	if (a!=0&&!mp[a]) {mp[a]=true;to++;}
	if (b!=0&&!mp[b]) {mp[b]=true;to++;}
	if (c!=0&&!mp[c]) {mp[c]=true;to++;}
	return to;
}
int main()
{
 	/*
	#ifndef ONLINE_JUDGE
		freopen("in.txt","r",stdin);
		freopen("out.txt","w",stdout);
	#endif*/
 
	cin>>n>>s;
	ar[1][0][0][0][ts(s[0])] = 1;
	ar[1][0][ts(s[0])][0][0] = 1;
	for (int a=2;a<=n;a++)
	{
		for (int b=0;b<4;b++)
		{
			for (int c=0;c<4;c++)
			{
				for (int d=0;d<4;d++)
				{
					for (int e=0;e<4;e++)
					{
						if (ar[(a-1)%2][b][c][d][e]>0)
						{
							ar[a%2][c][ts(s[a-1])][d][e] = max(ar[a%2][c][ts(s[a-1])][d][e],ar[(a-1)%2][b][c][d][e]+hm(b,c,ts(s[a-1])));
							ar[a%2][b][c][e][ts(s[a-1])] = max(ar[a%2][b][c][e][ts(s[a-1])],ar[(a-1)%2][b][c][d][e]+hm(d,e,ts(s[a-1])));
							mx=max(mx,ar[a%2][c][ts(s[a-1])][d][e]);
							mx=max(mx,ar[a%2][b][c][e][ts(s[a-1])]);
						}
					}
				}
			}
		}
	}
	cout<<mx<<"\n";
	return 0;
} 

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 7 / 7
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 8 / 8
• Subtask 10: 8 / 8
• Subtask 11: 8 / 8
• Subtask 12: 8 / 8