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Submission #502884

# Submission time Handle Problem Language Result Execution time Memory
502884 2022-01-06T17:17:41 Z tabr Miners (IOI07_miners) C++17
100 / 100
 482 ms 508 KB 
#include <bits/stdc++.h>
using namespace std;
#ifdef tabr
#include "library/debug.cpp"
#else
#define debug(...)
#endif

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    string s;
    cin >> s;
    const int inf = (int) 1e9;
    vector dp(4, vector(4, vector(4, vector<int>(4, -inf))));
    dp[0][0][0][0] = 0;
    for (int id = 0; id < n; id++) {
        vector new_dp(4, vector(4, vector(4, vector<int>(4, -inf))));
        int x = (s[id] == 'M' ? 1 : (s[id] == 'F' ? 2 : 3));
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 4; j++) {
                for (int k = 0; k < 4; k++) {
                    for (int l = 0; l < 4; l++) {
                        int c = 0;
                        c |= 1 << x;
                        c |= 1 << i;
                        c |= 1 << j;
                        c &= ~1;
                        new_dp[x][i][k][l] = max(new_dp[x][i][k][l], dp[i][j][k][l] + __builtin_popcount(c));
                        c = 0;
                        c |= 1 << x;
                        c |= 1 << k;
                        c |= 1 << l;
                        c &= ~1;
                        new_dp[i][j][x][k] = max(new_dp[i][j][x][k], dp[i][j][k][l] + __builtin_popcount(c));
                    }
                }
            }
        }
        swap(dp, new_dp);
    }
    int ans = 0;
    for (int i = 0; i < 4; i++) {
        for (int j = 0; j < 4; j++) {
            for (int k = 0; k < 4; k++) {
                for (int l = 0; l < 4; l++) {
                    ans = max(ans, dp[i][j][k][l]);
                }
            }
        }
    }
    cout << ans << '\n';
    return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct

Subtask #5
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct

Subtask #6
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct

Subtask #7
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 204 KB Output is correct

Subtask #8
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 328 KB Output is correct

Subtask #9
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 332 KB Output is correct

Subtask #10
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 131 ms 340 KB Output is correct

Subtask #11
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 362 ms 480 KB Output is correct

Subtask #12
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 482 ms 508 KB Output is correct