Submission #798151

#	Time	Username	Problem	Language	Result	Execution time	Memory
798151		Liudas	Miners (IOI07_miners)	C++17	100 / 100	179 ms	1000 KiB

miners

#include <bits/stdc++.h>

using namespace std;
int dp[2][4][4][4][4];
int f(int a, int b, int c){
    return (a == 1 || b == 1 || c == 1) + (a == 2 || b == 2 || c == 2) + (a == 3 || b == 3 || c == 3);
}
int main()
{
    int N;
    cin >> N;
    string s;
    cin >> s;
    vector<int> v(N);
    for(int i = 0; i < N ; i++){
        v[i] = (s.substr(i, 1) == "M" ? 1 : (s.substr(i, 1) == "F" ? 2 : 3));
    }
    int x = 1, l = 0;
    for(int i = N-1; i >= 0; i --){
        for(int a = 0; a < 4; a ++){
            for(int b = 0; b < 4; b ++){
                for(int c = 0; c < 4; c ++){
                    for(int d = 0; d < 4; d ++){
                        int e = v[i];
                        dp[x][a][b][c][d] = max(dp[l][b][e][c][d] + f(a,b,e), dp[l][a][b][d][e] + f(c,d,e));
                    }
                }
            }
        }
        x ^= 1;
        l ^= 1;
    }
    cout << dp[l][0][0][0][0] << endl;
    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