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Submission #285444

# Submission time Handle Problem Language Result Execution time Memory
285444 2020-08-29T02:30:52 Z a14789654 Palindrome-Free Numbers (BOI13_numbers) C++17
100 / 100
 3 ms 2944 KB 
#include <bits/stdc++.h>

using namespace std;

long long f[20][2][2][20][10][10][2];
string a, b;
int n;

long long calc(int pos, bool ok1, bool ok2, int start, int prev, int prevPrev, bool check)
{
    if (pos == n + 1) return !check;
    if (f[pos][ok1][ok2][start][prev][prevPrev][check] != - 1) return f[pos][ok1][ok2][start][prev][prevPrev][check];
    int low = 0, high = 9;
    if (ok1) low = a[pos] - '0';
    if (ok2) high = b[pos] - '0';
    long long res = 0;
    for (int i = low; i <= high; ++i)
    {
        bool okI = ok1 && i == a[pos] - '0', okII = ok2 && i == b[pos] - '0';
        int first = (!start && i) ? pos : start;
        bool okIII = check;
        okIII |= start && i == prev;
        okIII |= start && pos - start + 1 > 2 && i == prevPrev;
        res += calc(pos + 1, okI, okII, first, i, prev, okIII);
    }
    return f[pos][ok1][ok2][start][prev][prevPrev][check] = res;
}

int main()
{
//    freopen("test.inp", "r", stdin);
//    freopen("test.out", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cin >> a >> b;
    while (a.size() < b.size()) a = "0" + a;
    n = a.size();
    a = "p" + a, b = "p" + b;
    memset(f, - 1, sizeof(f));
    cout << calc(1, 1, 1, 0, 0, 0, 0);
    return 0;
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2816 KB Output is correct
2 Correct 2 ms 2816 KB Output is correct
3 Correct 2 ms 2816 KB Output is correct
4 Correct 2 ms 2816 KB Output is correct
5 Correct 2 ms 2816 KB Output is correct
6 Correct 2 ms 2944 KB Output is correct
7 Correct 2 ms 2816 KB Output is correct
8 Correct 2 ms 2816 KB Output is correct
9 Correct 2 ms 2816 KB Output is correct
10 Correct 2 ms 2816 KB Output is correct
11 Correct 2 ms 2816 KB Output is correct
12 Correct 2 ms 2816 KB Output is correct
13 Correct 2 ms 2816 KB Output is correct
14 Correct 2 ms 2816 KB Output is correct
15 Correct 2 ms 2816 KB Output is correct
16 Correct 2 ms 2816 KB Output is correct
17 Correct 2 ms 2816 KB Output is correct
18 Correct 2 ms 2816 KB Output is correct
19 Correct 2 ms 2816 KB Output is correct
20 Correct 2 ms 2816 KB Output is correct

Subtask #2
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2816 KB Output is correct
2 Correct 2 ms 2816 KB Output is correct
3 Correct 2 ms 2816 KB Output is correct
4 Correct 2 ms 2816 KB Output is correct
5 Correct 2 ms 2816 KB Output is correct
6 Correct 3 ms 2816 KB Output is correct
7 Correct 2 ms 2816 KB Output is correct
8 Correct 2 ms 2816 KB Output is correct
9 Correct 2 ms 2816 KB Output is correct
10 Correct 3 ms 2816 KB Output is correct
11 Correct 2 ms 2816 KB Output is correct
12 Correct 2 ms 2816 KB Output is correct
13 Correct 2 ms 2816 KB Output is correct
14 Correct 2 ms 2816 KB Output is correct
15 Correct 2 ms 2816 KB Output is correct
16 Correct 2 ms 2816 KB Output is correct
17 Correct 2 ms 2816 KB Output is correct
18 Correct 2 ms 2816 KB Output is correct
19 Correct 2 ms 2816 KB Output is correct
20 Correct 2 ms 2816 KB Output is correct
21 Correct 2 ms 2816 KB Output is correct
22 Correct 2 ms 2816 KB Output is correct
23 Correct 2 ms 2816 KB Output is correct
24 Correct 2 ms 2816 KB Output is correct
25 Correct 2 ms 2816 KB Output is correct
26 Correct 2 ms 2816 KB Output is correct
27 Correct 2 ms 2816 KB Output is correct
28 Correct 2 ms 2816 KB Output is correct
29 Correct 3 ms 2944 KB Output is correct
30 Correct 2 ms 2816 KB Output is correct
31 Correct 2 ms 2816 KB Output is correct
32 Correct 2 ms 2816 KB Output is correct
33 Correct 2 ms 2816 KB Output is correct
34 Correct 2 ms 2816 KB Output is correct
35 Correct 2 ms 2816 KB Output is correct
36 Correct 2 ms 2816 KB Output is correct
37 Correct 3 ms 2816 KB Output is correct
38 Correct 2 ms 2816 KB Output is correct
39 Correct 2 ms 2816 KB Output is correct
40 Correct 2 ms 2816 KB Output is correct
41 Correct 2 ms 2816 KB Output is correct
42 Correct 2 ms 2816 KB Output is correct
43 Correct 2 ms 2816 KB Output is correct
44 Correct 2 ms 2816 KB Output is correct
45 Correct 2 ms 2816 KB Output is correct