Onnenluku

#include <bits/stdc++.h>
using namespace std;
using ii=long long;
ii hae(const string &c, int x, const int a, const int b, bool au, bool bu, bool f, bool o)
{
    if (x == (int) c.size()) {
        return (o ? f == 0 : 1) && au && bu;
    }
    return (!f || (f && a <= c[x]) ? hae(c, x + 1, a, b, 1, bu, (a == c[x]) && f, o) : 0)
        + (!f || (f && b <= c[x]) ? hae(c, x + 1, a, b, au, 1, (b == c[x]) && f, o) : 0);
}
ii calc(string &c, bool o = 0)
{
    for (char &x : c) {
        x -= '0';
    }
    ii r = 0;
    for (int i = 1; i <= 9; ++i) {
        for (int j = i + 1; j <= 9; ++j) {
            r += hae(c, 0, i, j, 0, 0, 1, o);
        }
    }
    return r;
}
int main()
{
    string a, b;
    cin >> a >> b;
    cout << calc(b) - calc(a, 1) << "\n";
}

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 1

Verdict: WRONG ANSWER

Test 3

Group: 1

Verdict: WRONG ANSWER

Test 4

Group: 1

Verdict: WRONG ANSWER

Test 5

Group: 1

Verdict: WRONG ANSWER

Test 6

Group: 2

Verdict: WRONG ANSWER

Test 7

Group: 2

Verdict: WRONG ANSWER

Test 8

Group: 2

Verdict: WRONG ANSWER

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED