Submission #1011401

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011401		kaopj	Miners (IOI07_miners)	C++17	100 / 100	77 ms	100900 KiB

miners

#include <iostream>
#include <string.h>
#define lgm cin.tie(0)->sync_with_stdio(0);
using namespace std;
signed main() {
    lgm;
    int n;
    cin >> n;
    char x[n+1];
    int c[n];
    cin >> x;
    for (int i=0;i<n;i++) {
        if (x[i] == 'M') {
            c[i]=0;
        } else if (x[i] == 'B') {
            c[i]=1;
        } else {
            c[i]=2;
        }
    }
    int dp[n+1][4][4][4][4];
    memset(dp,0,sizeof dp);
    int mx=0;
    for (int i=1;i<=n;i++) {
        for (int p1=0;p1<3;p1++) {
            for (int p2=0;p2<3;p2++) {
                for (int q1=0;q1<3;q1++) {
                    for (int q2=0;q2<3;q2++) {
                        int cnt1,cnt2;
                        if (p1 == p2 && c[i-1] == p1) {
                            cnt1=1;
                        } else if (p1 ^ p2 && c[i-1] ^ p1 && c[i-1] ^ p2) {
                            cnt1=3;
                        } else {
                            cnt1=2;
                        }
                        if (q1 == q2 && c[i-1] == q1) {
                            cnt2=1;
                        } else if (q1 ^ q2 && c[i-1] ^ q1 && c[i-1] ^ q2) {
                            cnt2=3;
                        } else {
                            cnt2=2;
                        }
                        dp[i][p2][c[i-1]][q1][q2]=max(dp[i][p2][c[i-1]][q1][q2],dp[i-1][p1][p2][q1][q2]+cnt1);
                        mx=max(mx,dp[i][p2][c[i-1]][q1][q2]);
                        dp[i][p1][p2][q2][c[i-1]]=max(dp[i][p1][p2][q2][c[i-1]],dp[i-1][p1][p2][q1][q2]+cnt2);
                        mx=max(mx,dp[i][p1][p2][q2][c[i-1]]);
                    }
                }
            }
        }
    }
    cout << mx-6;
    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