oj.uz

Submission #778938

# Submission time Handle Problem Language Result Execution time Memory
778938 2023-07-11T03:47:29 Z ind1v Palindrome-Free Numbers (BOI13_numbers) C++11
100 / 100
 1 ms 340 KB 
#include <bits/stdc++.h>

using namespace std;

long long a, b;
vector<int> d;
long long f[20][10][10][2][2][2];

long long dp(int pos, int nprv, int prv, bool nz, bool nnz, bool t) {
  if (pos == d.size()) {
    return 1;
  }
  long long &res = f[pos][nprv][prv][nz][nnz][t];
  if (res != -1) {
    return res;
  }
  res = 0;
  int lim = t ? 9 : d[pos];
  for (int i = 0; i <= lim; i++) {
    if (nz && i == prv) {
      continue;
    }
    if (nnz && i == nprv) {
      continue;
    }
    res += dp(pos + 1, prv, i, nz || (i != 0), nz, t || (i < d[pos]));
  }
  return res;
}

long long solve(long long x) {
  if (x < 0) {
    return 0;
  }
  d.clear();
  while (x > 0) {
    d.emplace_back(x % 10);
    x /= 10;
  }
  reverse(d.begin(), d.end());
  memset(f, -1, sizeof(f));
  return dp(0, 0, 0, 0, 0, 0);
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> a >> b;
  cout << solve(b) - solve(a - 1);
  return 0;
}

Compilation message

numbers.cpp: In function 'long long int dp(int, int, int, bool, bool, bool)':
numbers.cpp:10:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |   if (pos == d.size()) {
      |       ~~~~^~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #2
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct