Submission #458143

#	Time	Username	Problem	Language	Result	Execution time	Memory
458143		JovanB	Miners (IOI07_miners)	C++17	100 / 100	251 ms	604 KiB

miners

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;

int dp[4][4][4][4];
int dpp[4][4][4][4];

int main(){
    ios_base::sync_with_stdio(false);
    cout.precision(10);
    cout<<fixed;

    int n;
    cin >> n;
    string s;
    cin >> s;
    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++){
                    dpp[a][b][c][d] = -100000000;
                }
            }
        }
    }
    dpp[0][0][0][0] = 0;
    for(int i=1; i<=n; i++){
        int x;
        if(s[i-1] == 'M') x = 1;
        else if(s[i-1] == 'F') x = 2;
        else x = 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++){
                        dp[a][b][c][d] = -100000000;
                    }
                }
            }
        }
        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++){
                        bool bio[4];
                        for(int j=1; j<=3; j++) bio[j] = 0;
                        bio[a] = 1;
                        bio[b] = 1;
                        bio[x] = 1;
                        int sum = 0;
                        for(int j=1; j<=3; j++){
                            sum += bio[j];
                        }
                        dp[b][x][c][d] = max(dp[b][x][c][d], dpp[a][b][c][d] + sum);
                        for(int j=1; j<=3; j++) bio[j] = 0;
                        bio[c] = 1;
                        bio[d] = 1;
                        bio[x] = 1;
                        sum = 0;
                        for(int j=1; j<=3; j++){
                            sum += bio[j];
                        }
                        dp[a][b][d][x] = max(dp[a][b][d][x], dpp[a][b][c][d] + sum);
                    }
                }
            }
        }
        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++){
                        dpp[a][b][c][d] = dp[a][b][c][d];
                    }
                }
            }
        }
    }
    int mx = 0;
    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++){
                    mx = max(mx, dp[a][b][c][d]);
                }
            }
        }
    }
    cout << mx;
    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