Submission #1016329

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1016329	2024-07-07T19:35:20 Z	delwar_03_	Palindrome-Free Numbers (BOI13_numbers)	C++17	100 / 100	1 ms	604 KB

numbers

#include <bits/stdc++.h>
#define int long long
#define endl '\n'
using namespace std;
const int mod = 1e9 + 7;
const int N = 1e5 + 10;

int dp[20][12][12][2][2]; // (ind, prv, cur, tight, started)

void solve() {
    int l, r; cin>>l>>r;
    string s;

    function<int(int, int, int, int, int)> magic = [&] (int ind, int prv, int cur, int tight, int started) {
        if(ind == s.size()) return 1LL;

        int &ans = dp[ind][prv][cur][tight][started];
        if(~ans) return ans;

        ans = 0;
        int mx = tight ? s[ind] - '0' : 9;

        for(int i = 0; i <= mx; i++) {
            if(i == 0 && !started) {
                ans += magic(ind + 1, prv, cur, tight & (i == mx), 0);
            } else if(i != prv && i != cur) {
                ans += magic(ind + 1, cur, i, tight & (i == mx), 1);
            }
        }

        return ans;
    };


    auto cnt = [&] (int n) {
        s = to_string(n);
        int ans = 0;
        memset(dp, -1, sizeof dp);
        ans += magic(0, 10, 10, 1, 0);
        return ans;
    };

    cout<<cnt(r) - cnt(l - 1)<<endl;
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    int t = 1, c = 1; //cin>>t;
    while(t--) {
        // cerr<<"Case "<<c++<<": \n";
        solve();
    }
}

/*
i/p: 
o/p: 
*/

Compilation message

numbers.cpp: In lambda function:
numbers.cpp:15:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |         if(ind == s.size()) return 1LL;
      |            ~~~~^~~~~~~~~~~
numbers.cpp: In function 'int main()':
numbers.cpp:51:16: warning: unused variable 'c' [-Wunused-variable]
   51 |     int t = 1, c = 1; //cin>>t;
      |                ^

Subtask #1

25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	0 ms	344 KB	Output is correct
14	Correct	1 ms	604 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	460 KB	Output is correct
19	Correct	1 ms	344 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct

Subtask #2

75.0 / 75.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	0 ms	460 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	1 ms	460 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	1 ms	344 KB	Output is correct
29	Correct	1 ms	348 KB	Output is correct
30	Correct	0 ms	348 KB	Output is correct
31	Correct	1 ms	468 KB	Output is correct
32	Correct	1 ms	348 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	1 ms	348 KB	Output is correct
36	Correct	0 ms	348 KB	Output is correct
37	Correct	1 ms	460 KB	Output is correct
38	Correct	1 ms	344 KB	Output is correct
39	Correct	0 ms	348 KB	Output is correct
40	Correct	1 ms	348 KB	Output is correct
41	Correct	0 ms	348 KB	Output is correct
42	Correct	1 ms	344 KB	Output is correct
43	Correct	1 ms	348 KB	Output is correct
44	Correct	0 ms	348 KB	Output is correct
45	Correct	0 ms	348 KB	Output is correct