Submission #306331

#	Time	Username	Problem	Language	Result	Execution time	Memory
306331		sofapuden	Miners (IOI07_miners)	C++14	100 / 100	1243 ms	100728 KiB

miners

#include <bits/stdc++.h>

using namespace std;
int dp[100005][4][4][4][4];

int main(){
	int n; cin >> n;
	memset(dp,0,sizeof dp);
	dp[0][0][0][0][0] = 1;
	for(int x = 0; x < n; ++x){
		char c; cin >> c;
		int val = 0;
		if(c == 'M')val = 1;
		if(c == 'B')val = 2;
		if(c == 'F')val = 3;
		for(int i = 0; i < 4; ++i){
			for(int j = 0; j < 4; ++j){
				for(int k = 0; k < 4; ++k){
					for(int l = 0; l < 4; ++l){
						if(!dp[x][i][j][k][l])continue;
						set<int> ans1, ans2;
						ans1.insert(i);
						ans1.insert(j);
						ans1.insert(val);
						ans2.insert(k);
						ans2.insert(l);
						ans2.insert(val);
						ans1.erase(0);
						ans2.erase(0);
						dp[x+1][j][val][k][l] = max(dp[x+1][j][val][k][l], dp[x][i][j][k][l]+(int)ans1.size());
						dp[x+1][i][j][l][val] = max(dp[x+1][i][j][l][val], dp[x][i][j][k][l]+(int)ans2.size());
						
					}
				}
			}
		}
	}
	int ans = 0;
	for(int i = 0; i < 4; ++i){
		for(int j = 0; j < 4; ++j){
			for(int k = 0; k < 4; ++k){
				for(int l = 0; l < 4; ++l){
					ans = max(ans, dp[n][i][j][k][l]);
				}
			}
		}
	}
	cout << ans-1 << "\n";

		
}
			
					
			
			

• 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