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Submission #414634

# Submission time Handle Problem Language Result Execution time Memory
414634 2021-05-30T19:02:02 Z Christopher_Rdz Miners (IOI07_miners) C++14
100 / 100
 137 ms 700 KB 
#include <bits/stdc++.h>
using namespace std;

int n;
int food[100002];
char s;
int dp[3][4][4][4][4];

int costo(int a, int b, int c){
    int tot = 1;
    if (a != b and !(a == 0 or b == 0)) tot++;
    if (a != c and b != c and !(b == 0 or c == 0)) tot++;
    return tot; 
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    for (int i = 0; i < n; i++){
        cin >> s;
        if (s == 'M') food[i] = 1;
        if (s == 'F') food[i] = 2;
        if (s == 'B') food[i] = 3;
    }
    for (int i = n - 1; i >= 0; i--){
        for (int x1 = 0; x1 < 4; x1++){
            for (int x2 = 0; x2 < 4; x2++){
                for (int y1 = 0; y1 < 4; y1++){
                    for (int y2 = 0; y2 < 4; y2++){
                        int aux = costo(food[i], x1, x2);
                        int c1 = 0, c2 = 0;
                        c1 = dp[(i + 1) % 2][food[i]][x1][y1][y2] + aux;
                        aux = costo(food[i], y1, y2);
                        c2 = dp[(i + 1) % 2][x1][x2][food[i]][y1] + aux;
                        dp[i % 2][x1][x2][y1][y2] = max(c1, c2);
                    }
                }
            }
        }
    }
    cout << dp[0][0][0][0][0];
    return 0;
}

Subtask #1
9.0 / 9.0

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

Subtask #2
9.0 / 9.0

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

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 204 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 2 ms 204 KB Output is correct

Subtask #8
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 332 KB Output is correct

Subtask #9
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 360 KB Output is correct

Subtask #10
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 332 KB Output is correct

Subtask #11
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 600 KB Output is correct

Subtask #12
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 137 ms 700 KB Output is correct