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Submission #1102885

# Submission time Handle Problem Language Result Execution time Memory
1102885 2024-10-19T07:54:05 Z Avocabo Palindrome-Free Numbers (BOI13_numbers) C++17
100 / 100
 1 ms 768 KB 
#include <bits/stdc++.h>
using namespace std;

#define task "PALINFREE"
#define fi first
#define se second
#define pii pair <int, int>
#define pb push_back
#define ll long long 
#define pip pair <int, pii>
#define pli pair <ll, int>

const int N = 1e5 + 5;
const int mod = 1e9 + 7;
const ll inf = 1e18 + 7;

long long a, b, f[25][5][5][15][15];
int n;
string s;

int myabs(int x)
{
    return x < 0 ? -x : x;
}

void inp()
{
    cin >> a;
    cin >> b;
}

long long dp(int k, int st, int small, int pre1, int pre2)
{
    if (k == n)
        return 1;
    if (f[k][st][small][pre1][pre2] != -1)
        return f[k][st][small][pre1][pre2];
    long long ans = 0;
    int lim = 9;
    if (small)
        lim = s[k] - '0';
    for (int i=0; i<=lim; ++i)
    {
        if (i == pre1 || i == pre2)
            continue;
        int new_small = (small && i == lim);
        int new_start = (st || i != 0);
        if (new_start)
            ans += dp(k + 1, new_start, new_small, i, pre1);
        else ans += dp(k + 1, new_start, new_small, 10, 10);
    }
    return (f[k][st][small][pre1][pre2] = ans);
}

long long calc(long long a)
{
    for (int i=0; i<20; ++i)
        for (int j=0; j<2; ++j)
            for (int x=0; x<2; ++x)
                for (int y=0; y<11; ++y)
                    for (int z=0; z <11; ++z)
                        f[i][j][x][y][z] = -1;
    s = to_string(a);
    n = (int)s.size();
    return dp(0, 0, 1, 10, 10);
}

void solve()
{
    cout << calc(b) - calc(a-1) << endl;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen(task".inp", "r"))
    {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    inp();
    solve();
    return 0;
}

Compilation message

numbers.cpp: In function 'int main()':
numbers.cpp:80:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
numbers.cpp:81:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 592 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct
15 Correct 1 ms 676 KB Output is correct
16 Correct 1 ms 760 KB Output is correct
17 Correct 1 ms 592 KB Output is correct
18 Correct 1 ms 592 KB Output is correct
19 Correct 1 ms 592 KB Output is correct
20 Correct 1 ms 592 KB Output is correct

Subtask #2
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 760 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct
15 Correct 1 ms 592 KB Output is correct
16 Correct 1 ms 592 KB Output is correct
17 Correct 1 ms 592 KB Output is correct
18 Correct 1 ms 592 KB Output is correct
19 Correct 1 ms 592 KB Output is correct
20 Correct 1 ms 592 KB Output is correct
21 Correct 1 ms 592 KB Output is correct
22 Correct 1 ms 592 KB Output is correct
23 Correct 1 ms 592 KB Output is correct
24 Correct 1 ms 592 KB Output is correct
25 Correct 1 ms 592 KB Output is correct
26 Correct 1 ms 592 KB Output is correct
27 Correct 1 ms 592 KB Output is correct
28 Correct 1 ms 592 KB Output is correct
29 Correct 1 ms 592 KB Output is correct
30 Correct 1 ms 592 KB Output is correct
31 Correct 1 ms 592 KB Output is correct
32 Correct 1 ms 592 KB Output is correct
33 Correct 1 ms 592 KB Output is correct
34 Correct 1 ms 592 KB Output is correct
35 Correct 1 ms 592 KB Output is correct
36 Correct 1 ms 592 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 636 KB Output is correct
39 Correct 1 ms 592 KB Output is correct
40 Correct 1 ms 592 KB Output is correct
41 Correct 1 ms 592 KB Output is correct
42 Correct 1 ms 592 KB Output is correct
43 Correct 1 ms 592 KB Output is correct
44 Correct 1 ms 592 KB Output is correct
45 Correct 1 ms 592 KB Output is correct