Submission #946904

#	Time	Username	Problem	Language	Result	Execution time	Memory
946904		yellowtoad	Miners (IOI07_miners)	C++17	100 / 100	213 ms	200788 KiB

miners

#include <iostream>
using namespace std;

long long n, dp[100010][4][4][4][4], num, maxx;
char ch;

int main() {
	cin >> n;
	for (int i = 0; i <= n; i++) for (int a = 0; a <= 3; a++) for (int b = 0; b <= 3; b++) for (int c = 0; c <= 3; c++) for (int d = 0; d <= 3; d++) dp[i][a][b][c][d] = -1e18;
	dp[0][0][0][0][0] = 0;
	for (int i = 1; i <= n; i++) {
		cin >> ch;
		if (ch == 'M') num = 1;
		else if (ch == 'B') num = 2;
		else num = 3;
		for (int a = 0; a <= 3; a++) {
			for (int b = 0; b <= 3; b++) {
				for (int c = 0; c <= 3; c++) {
					for (int d = 0; d <= 3; d++) {
						if ((a == 0) && (b == 0)) dp[i][b][num][c][d] = max(dp[i][b][num][c][d],dp[i-1][a][b][c][d]+1);
						else if ((a == 0) && (b == num)) dp[i][b][num][c][d] = max(dp[i][b][num][c][d],dp[i-1][a][b][c][d]+1);
						else if ((a == 0) && (b != num)) dp[i][b][num][c][d] = max(dp[i][b][num][c][d],dp[i-1][a][b][c][d]+2);
						else if ((a == b) && (b == num)) dp[i][b][num][c][d] = max(dp[i][b][num][c][d],dp[i-1][a][b][c][d]+1);
						else if ((a != b) && (b != num) && (a != num)) dp[i][b][num][c][d] = max(dp[i][b][num][c][d],dp[i-1][a][b][c][d]+3);
						else dp[i][b][num][c][d] = max(dp[i][b][num][c][d],dp[i-1][a][b][c][d]+2);
						if ((c == 0) && (d == 0)) dp[i][a][b][d][num] = max(dp[i][a][b][d][num],dp[i-1][a][b][c][d]+1);
						else if ((c == 0) && (d == num)) dp[i][a][b][d][num] = max(dp[i][a][b][d][num],dp[i-1][a][b][c][d]+1);
						else if ((c == 0) && (d != num)) dp[i][a][b][d][num] = max(dp[i][a][b][d][num],dp[i-1][a][b][c][d]+2);
						else if ((c == d) && (d == num)) dp[i][a][b][d][num] = max(dp[i][a][b][d][num],dp[i-1][a][b][c][d]+1);
						else if ((c != d) && (d != num) && (c != num)) dp[i][a][b][d][num] = max(dp[i][a][b][d][num],dp[i-1][a][b][c][d]+3);
						else dp[i][a][b][d][num] = max(dp[i][a][b][d][num],dp[i-1][a][b][c][d]+2);
					}
				}
			}
		}
	}
	for (int a = 0; a <= 3; a++) for (int b = 0; b <= 3; b++) for (int c = 0; c <= 3; c++) for (int d = 0; d <= 3; d++) maxx = max(maxx,dp[n][a][b][c][d]);
	cout << maxx << endl;
}

• 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