Submission #1090221

#	Time	Username	Problem	Language	Result	Execution time	Memory
1090221		TrinhKhanhDung	Miners (IOI07_miners)	C++14	100 / 100	378 ms	401936 KiB

miners

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define ALL(v) v.begin(),v.end()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define oo (ll)1e18
#define INF (ll)1e9
#define MOD (ll)(1e9 + 7)

using namespace std;

template<class T1, class T2>
    bool maximize(T1 &a, T2 b){if(a < b){a = b; return true;} return false;}

template<class T1, class T2>
    bool minimize(T1 &a, T2 b){if(a > b){a = b; return true;} return false;}

template<class T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}

template<class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}

template<class T>
    void cps(T &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}

const int MAX = 1e5 + 10;

int N;
int arr[MAX];
string s;
int f[MAX][8][4][8][4];

void solve(){
    cin >> N >> s;
    for(int i = 1; i <= N; i++){
        if(s[i - 1] == 'M') arr[i] = 0;
        if(s[i - 1] == 'F') arr[i] = 1;
        if(s[i - 1] == 'B') arr[i] = 2;
    }
    memset(f, -0x3f, sizeof f);
    f[0][0][3][0][3] = 0;
    for(int i = 0; i < N; i++){
        for(int a = 0; a < 8; a++) for(int b = 0; b < 4; b++){
            for(int x = 0; x < 8; x++) for(int y = 0; y < 4; y++) if(f[i][a][b][x][y] >= 0){
                maximize(f[i + 1][(b == 3 ? 0 : MASK(b)) | MASK(arr[i + 1])][arr[i + 1]][x][y], f[i][a][b][x][y] + __builtin_popcount(a | MASK(arr[i + 1])));
                maximize(f[i + 1][a][b][(y == 3 ? 0 : MASK(y)) | MASK(arr[i + 1])][arr[i + 1]], f[i][a][b][x][y] + __builtin_popcount(x | MASK(arr[i + 1])));
            }
        }
    }
    int ans = 0;
    for(int a = 0; a < 8; a++) for(int b = 0; b < 4; b++){
        for(int x = 0; x < 8; x++) for(int y = 0; y < 4; y++) if(f[N][a][b][x][y] >= 0){
            maximize(ans, f[N][a][b][x][y]);
        }
    }

    cout << ans;
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//     freopen("capsomayman.inp","r",stdin);
//     freopen("capsomayman.out","w",stdout);

    int t = 1;
//    cin >> t;
    while(t--){
        solve();
    }

    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