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Submission #346700

# Submission time Handle Problem Language Result Execution time Memory
346700 2021-01-10T18:32:53 Z illequiprogrammat Palindrome-Free Numbers (BOI13_numbers) C++14
0 / 100
 1 ms 384 KB 
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

typedef long long ll;

struct SOLUTION {
    bool vis[30][11][11][2][2];
    // memo[index][penultimate][end_digit][tight][notzeros];
    ll memo[30][11][11][2][2];

    vector<int> digits;

    ll dp(int index, int penultimate, int end, bool tight, bool notzeros) {
        if (index == digits.size()) return 1;
        if (vis[index][penultimate][end][tight][notzeros])
            return memo[index][penultimate][end][tight][notzeros];

        ll res = 0;
        int max_next = 9;
        if (tight) max_next = digits[index];

        for (int i = 0; i <= max_next; i++) {
            if (i != penultimate && i != end) {
                res += dp(index + 1, end, (i == 0 && notzeros) ? 10 : i, tight && i == max_next, notzeros || (i > 0));
            }
        }

        vis[index][penultimate][end][tight][notzeros] = true;
        memo[index][penultimate][end][tight][notzeros] = res;
        return res;
    }

    void get_digits(ll n) {
        while (n != 0) {
            digits.push_back(n%10);
            n /= 10;
        }
        reverse(digits.begin(), digits.end());
    }

    bool is_palindrome() {
        //cout << digits.size() << endl; 
        bool res = false;
        int i = 0;

        if (digits.size()>1)
            while (i < digits.size() - 1) {
                if (digits[i] == digits[i+1]) res = true;
                i++;
            }
        i = 0;

        if (digits.size() > 2)
            while (i < digits.size() - 2) {
                if (digits[i] == digits[i+2]) res = true;
                i++;
            }

        return res;
    }

};

int main() {
    int a, b;
    SOLUTION l_bound;
    SOLUTION u_bound;
    cin >> a >> b;
    if (a > b) swap(a, b);
    l_bound.get_digits(a-1);
    ll lres = 0;
    // index 0, allow all numbers inc 0, allow all numbers, tight = true
    if (a != 0) lres = l_bound.dp(0, 10, 10, true, false);
    u_bound.get_digits(b);
    ll ures = u_bound.dp(0, 10, 10, true, false);
    //cout << lres << " " << ures << endl;
    cout << ures - lres + !u_bound.is_palindrome() + !l_bound.is_palindrome()<< endl;
}

Compilation message

numbers.cpp: In member function 'll SOLUTION::dp(int, int, int, bool, bool)':
numbers.cpp:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         if (index == digits.size()) return 1;
      |             ~~~~~~^~~~~~~~~~~~~~~~
numbers.cpp: In member function 'bool SOLUTION::is_palindrome()':
numbers.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |             while (i < digits.size() - 1) {
      |                    ~~^~~~~~~~~~~~~~~~~~~
numbers.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |             while (i < digits.size() - 2) {
      |                    ~~^~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 364 KB Output isn't correct
2 Incorrect 0 ms 364 KB Output isn't correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Incorrect 1 ms 384 KB Output isn't correct
5 Incorrect 1 ms 364 KB Output isn't correct
6 Incorrect 1 ms 376 KB Output isn't correct
7 Incorrect 1 ms 384 KB Output isn't correct
8 Incorrect 0 ms 364 KB Output isn't correct
9 Incorrect 1 ms 364 KB Output isn't correct
10 Incorrect 0 ms 364 KB Output isn't correct
11 Incorrect 1 ms 384 KB Output isn't correct
12 Incorrect 1 ms 364 KB Output isn't correct
13 Incorrect 0 ms 364 KB Output isn't correct
14 Incorrect 1 ms 384 KB Output isn't correct
15 Incorrect 1 ms 364 KB Output isn't correct
16 Incorrect 1 ms 364 KB Output isn't correct
17 Incorrect 1 ms 364 KB Output isn't correct
18 Incorrect 0 ms 364 KB Output isn't correct
19 Incorrect 1 ms 364 KB Output isn't correct
20 Incorrect 1 ms 364 KB Output isn't correct

Subtask #2
0 / 75.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 384 KB Output isn't correct
2 Incorrect 1 ms 364 KB Output isn't correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Incorrect 1 ms 364 KB Output isn't correct
5 Incorrect 1 ms 364 KB Output isn't correct
6 Incorrect 1 ms 384 KB Output isn't correct
7 Incorrect 1 ms 368 KB Output isn't correct
8 Incorrect 1 ms 364 KB Output isn't correct
9 Incorrect 1 ms 364 KB Output isn't correct
10 Incorrect 1 ms 364 KB Output isn't correct
11 Incorrect 1 ms 364 KB Output isn't correct
12 Incorrect 1 ms 364 KB Output isn't correct
13 Incorrect 1 ms 364 KB Output isn't correct
14 Incorrect 1 ms 364 KB Output isn't correct
15 Incorrect 1 ms 364 KB Output isn't correct
16 Incorrect 1 ms 364 KB Output isn't correct
17 Incorrect 1 ms 364 KB Output isn't correct
18 Incorrect 1 ms 364 KB Output isn't correct
19 Incorrect 1 ms 364 KB Output isn't correct
20 Incorrect 1 ms 364 KB Output isn't correct
21 Incorrect 1 ms 364 KB Output isn't correct
22 Incorrect 1 ms 380 KB Output isn't correct
23 Incorrect 1 ms 364 KB Output isn't correct
24 Incorrect 1 ms 364 KB Output isn't correct
25 Incorrect 1 ms 364 KB Output isn't correct
26 Incorrect 1 ms 364 KB Output isn't correct
27 Incorrect 1 ms 364 KB Output isn't correct
28 Incorrect 1 ms 364 KB Output isn't correct
29 Incorrect 1 ms 364 KB Output isn't correct
30 Incorrect 1 ms 364 KB Output isn't correct
31 Incorrect 1 ms 364 KB Output isn't correct
32 Incorrect 1 ms 364 KB Output isn't correct
33 Incorrect 1 ms 364 KB Output isn't correct
34 Incorrect 1 ms 364 KB Output isn't correct
35 Incorrect 1 ms 364 KB Output isn't correct
36 Incorrect 1 ms 364 KB Output isn't correct
37 Incorrect 1 ms 364 KB Output isn't correct
38 Incorrect 1 ms 364 KB Output isn't correct
39 Incorrect 1 ms 364 KB Output isn't correct
40 Incorrect 1 ms 364 KB Output isn't correct
41 Incorrect 1 ms 364 KB Output isn't correct
42 Incorrect 1 ms 364 KB Output isn't correct
43 Incorrect 1 ms 364 KB Output isn't correct
44 Incorrect 1 ms 364 KB Output isn't correct
45 Incorrect 1 ms 364 KB Output isn't correct