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Submission #1075741

# Submission time Handle Problem Language Result Execution time Memory
1075741 2024-08-26T08:57:12 Z ShadowShark Palindrome-Free Numbers (BOI13_numbers) C++17
100 / 100
 1 ms 604 KB 
#include <bits/stdc++.h>
using namespace std;

long long dp[20][11][11][2][2];
vector<int> num;

long long calc(int pos, int pre1, int pre2, int f, int leading_0) {
    if (pos == num.size()) return 1;

    if (dp[pos][pre1][pre2][f][leading_0] != -1) return dp[pos][pre1][pre2][f][leading_0];

    long long res = 0; int M = (f == 1 ? 9 : num[pos]);

    for (int i = 0; i <= M; i++) {
        int F = f;
        if (F == 0 && i < M) F = 1;

        if (leading_0) {
            if (i == pre1 || i == pre2) continue;
            res = res + calc(pos + 1, pre2, i, F, 1);
        }
        else {
            if (i == 0) res = res + calc(pos + 1, pre1, pre2, F, 0);
                else res = res + calc(pos + 1, pre1, i, F, 1);
        }
    }

    return dp[pos][pre1][pre2][f][leading_0] = res;
}

long long solve(long long x) {
    num.clear();
    memset(dp, -1, sizeof dp);

    while (x > 0) {
        num.push_back(x % 10);
        x = x / 10;
    }

    reverse(num.begin(), num.end());

    return calc(0, 10, 10, 0, 0);
}

int main() {
    long long a, b;
    cin >> a >> b;

    cout << solve(b) - solve(a - 1) + (a == 0 ? 1 : 0);
    return 0;
}

Compilation message

numbers.cpp: In function 'long long int calc(int, int, int, int, int)':
numbers.cpp:8:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     if (pos == num.size()) return 1;
      |         ~~~~^~~~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 436 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #2
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 440 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 448 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 436 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 344 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 436 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 444 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 0 ms 436 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 1 ms 440 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 1 ms 348 KB Output is correct