Submission #648480

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
648480	2022-10-06T16:24:49 Z	glome	Palindrome-Free Numbers (BOI13_numbers)	C++17	66.6667 / 100	1 ms	468 KB

numbers

#include <bits/stdc++.h>

using namespace std;


string num;

int dp[19][11][11][2][2];

int mod = 1e9 + 7;

int rec(int pos, int p1, int p2, int f, int ok) {
    if(pos == num.size()) return 1;

    if(dp[pos][p1][p2][f][ok] != -1) return dp[pos][p1][p2][f][ok];

    int LIM = 9;
    if(!f) LIM = num[pos] - '0';
    int res = 0;
    for (int i = 0; i<=LIM; i++) {
        if(ok) {
            if(i == p1 || i == p2) continue;
            res += rec(pos+1, i, p1, (f || i < LIM), 1); 
        }
        else res += rec(pos+1, (i == 0 ? 10 : i), p1, (f || i < LIM), (i != 0));
        if(res >= mod) res -= mod;
           
    }
    return dp[pos][p1][p2][f][ok] = res;
}



int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    long long A, B;
    cin >> A >> B;
    num = to_string(B);
    if(A == 0) {
        memset(dp, -1 ,sizeof(dp));
        cout << rec(0, 10, 10, 0,0) << '\n';
    }
    else {
        A--;
        memset(dp, -1 ,sizeof(dp));

        B = rec(0, 10, 10, 0,0);
        memset(dp, -1, sizeof(dp)); num = to_string(A);
        cout << (B - rec(0, 10, 10, 0, 0) + mod) % mod << '\n';
    }
    return 0;
}

Compilation message

numbers.cpp: In function 'int rec(int, int, int, int, int)':
numbers.cpp:13:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     if(pos == num.size()) return 1;
      |        ~~~~^~~~~~~~~~~~~

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	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 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	468 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 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	0 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

41.6666666667 / 75.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	340 KB	Output is correct
2	Incorrect	1 ms	340 KB	Output isn't correct
3	Incorrect	1 ms	340 KB	Output isn't correct
4	Incorrect	1 ms	340 KB	Output isn't 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	0 ms	340 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	1 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	1 ms	340 KB	Output is correct
21	Incorrect	1 ms	340 KB	Output isn't correct
22	Correct	1 ms	340 KB	Output is correct
23	Incorrect	1 ms	340 KB	Output isn't correct
24	Correct	1 ms	340 KB	Output is correct
25	Incorrect	1 ms	340 KB	Output isn't correct
26	Incorrect	1 ms	340 KB	Output isn't correct
27	Incorrect	1 ms	340 KB	Output isn't correct
28	Incorrect	1 ms	340 KB	Output isn't correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	1 ms	340 KB	Output is correct
31	Incorrect	1 ms	340 KB	Output isn't correct
32	Correct	1 ms	340 KB	Output is correct
33	Incorrect	0 ms	340 KB	Output isn't correct
34	Correct	1 ms	348 KB	Output is correct
35	Incorrect	1 ms	340 KB	Output isn't correct
36	Incorrect	1 ms	340 KB	Output isn't correct
37	Incorrect	1 ms	340 KB	Output isn't correct
38	Incorrect	1 ms	340 KB	Output isn't correct
39	Incorrect	0 ms	340 KB	Output isn't correct
40	Correct	1 ms	340 KB	Output is correct
41	Incorrect	1 ms	340 KB	Output isn't correct
42	Correct	1 ms	340 KB	Output is correct
43	Incorrect	1 ms	340 KB	Output isn't correct
44	Incorrect	1 ms	340 KB	Output isn't correct
45	Incorrect	1 ms	340 KB	Output isn't correct