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Submission #414631

# Submission time Handle Problem Language Result Execution time Memory
414631 2021-05-30T18:51:13 Z DavidDamian Miners (IOI07_miners) C++11
100 / 100
 237 ms 110168 KB 
#include <bits/stdc++.h>

using namespace std;
int n;
int food[100005];
int memo[100005][4][4][4][4];
int different(int a, int b, int c)
{
    if (a > b) swap(a, b);
    if (b > c) swap(b, c);
    if (a > b) swap(a, b);
    int cnt = 1;
    if (a != b) {
        cnt++;
    }
    if (b != c) {
        cnt++;
    }
    if (a == 0) cnt--;
    return cnt;
}

int coal(int i, int X1, int X2, int Y1, int Y2)
{
    if (i == n) return 0;
    if (memo[i][X1][X2][Y1][Y2] == -1) {
        int maximum = max(coal(i + 1, food[i], X1, Y1, Y2)
                          + different(food[i], X1, X2),
                          coal(i + 1, X1, X2, food[i], Y1)
                          + different(food[i], Y1, Y2));
        memo[i][X1][X2][Y1][Y2] = maximum;
    }
    return memo[i][X1][X2][Y1][Y2];
}
int main()
{
    memset(memo, -1, sizeof(memo));
    cin >> n;
    for (int i = 0; i < n; i++) {
        char c;
        cin >> c;
        if (c == 'M')
            food[i] = 1;
        else if (c == 'F')
            food[i] = 2;
        else if (c == 'B')
            food[i] = 3;
    }
    int maximum = coal(0, 0, 0, 0, 0);
    cout << maximum << '\n';
    return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 100472 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 100428 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 100352 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 100436 KB Output is correct

Subtask #5
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 100392 KB Output is correct

Subtask #6
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 100448 KB Output is correct

Subtask #7
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 100548 KB Output is correct

Subtask #8
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 100864 KB Output is correct

Subtask #9
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 59 ms 101516 KB Output is correct

Subtask #10
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 102852 KB Output is correct

Subtask #11
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 157 ms 107700 KB Output is correct

Subtask #12
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 237 ms 110168 KB Output is correct