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Submission #760106

# Submission time Handle Problem Language Result Execution time Memory
760106 2023-06-17T07:51:34 Z Blagoj Miners (IOI07_miners) C++17
100 / 100
 555 ms 612 KB 
#include <bits/stdc++.h>

using namespace std;

#define endl '\n'
#define ll long long
#define all(x) x.begin(), x.end()

inline void mx(int &u, int x) { u = max(u, x); }

int dp[4][4][4][4], cnt[4];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    string str;
    cin >> str;
    map<char, int> mp;
    mp['M'] = 1;
    mp['B'] = 2;
    mp['F'] = 3;
    int ans = 0;
    cnt[0] = 100;
    for (int i = 0; i < n; i++) {
        int dp1[4][4][4][4];
        memset(dp1, 0, sizeof(dp1));
        for (int j = 0; j <= 3; j++) {
            if (cnt[j] > 0) {
                cnt[j]--;
                for (int l = 0; l <= 3; l++) {
                    if (cnt[l] > 0) {
                        cnt[l]--;
                        set<int> s;
                        if (j != 0) s.insert(j);
                        if (l != 0) s.insert(l);
                        s.insert(mp[str[i]]);
                        for (int w = 0; w <= 3; w++) {
                            if (cnt[w] > 0) {
                                cnt[w]--;
                                for (int z = 0; z <= 3; z++) {
                                    if (cnt[z] > 0) {
                                        mx(dp1[l][mp[str[i]]][w][z],
                                           dp[j][l][w][z] + s.size());
                                    }
                                }
                                cnt[w]++;
                            }
                        }
                        cnt[l]++;
                    }
                }
                cnt[j]++;
            }
        }
        for (int w = 0; w <= 3; w++) {
            if (cnt[w] > 0) {
                cnt[w]--;
                for (int z = 0; z <= 3; z++) {
                    if (cnt[z] > 0) {
                        cnt[z]--;
                        set<int> s;
                        if (w != 0) s.insert(w);
                        if (z != 0) s.insert(z);
                        s.insert(mp[str[i]]);
                        for (int j = 0; j <= 3; j++) {
                            if (cnt[j] > 0) {
                                cnt[j]--;
                                for (int l = 0; l <= 3; l++) {
                                    if (cnt[l] > 0) {
                                        mx(dp1[j][l][z][mp[str[i]]],
                                           dp[j][l][w][z] + s.size());
                                    }
                                }
                                cnt[j]++;
                            }
                        }
                        cnt[z]++;
                    }
                }
                cnt[w]++;
            }
        }
        cnt[mp[str[i]]]++;
        for (int j = 0; j <= 3; j++) {
            for (int l = 0; l <= 3; l++) {
                for (int w = 0; w <= 3; w++) {
                    for (int z = 0; z <= 3; z++) {
                        dp[j][l][w][z] = dp1[j][l][w][z];
                        mx(ans, dp[j][l][w][z]);
                    }
                }
            }
        }
    }
    cout << ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct

Subtask #5
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct

Subtask #6
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct

Subtask #7
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 320 KB Output is correct

Subtask #8
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 312 KB Output is correct

Subtask #9
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 332 KB Output is correct

Subtask #10
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 376 KB Output is correct

Subtask #11
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 406 ms 564 KB Output is correct

Subtask #12
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 555 ms 612 KB Output is correct