답안 #637456

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
637456	2022-09-01T20:28:05 Z	glome	Palindrome-Free Numbers (BOI13_numbers)	C++17	100 / 100	1 ms	388 KB

numbers

#include <bits/stdc++.h>
 
using namespace std;

long long dp[19][11][11][2][2];

string num;

long long rec(int pos, int prev1, int prev2, int f, int prev) {
    if(pos == num.size()) return 1;

    if(dp[pos][prev1][prev2][prev][f] != -1) return dp[pos][prev1][prev2][prev][f];
    
    int LIM = 9;
    if(!f) LIM = num[pos] - '0';
    
    long long res = 0;

    for (int i = 0; i<=LIM; i++) {
        if(prev) {
            if(i == prev2 || i == prev1) continue;
            res += rec(pos + 1, i, prev1, (f || i < LIM), prev);
        }
        else {
            res += rec(pos + 1, (i != 0 ? i : 10), prev1, (f || i < LIM), (i != 0));
        }
    }
    return dp[pos][prev1][prev2][f][prev] = res;


}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    long long a,b, k = 0;
    cin >> a >> b;
    if(a == 0) k += 1;
    memset(dp, -1, sizeof(dp)); num = to_string(b);
    b = rec(0, 10, 10, 0, 0);
    a = max(a-1, 0LL);
    memset(dp, -1, sizeof(dp)); num = to_string(a);

    cout << b - rec(0, 10, 10, 0, 0) + k << '\n';
    return 0;
}

Compilation message

numbers.cpp: In function 'long long int rec(int, int, int, int, int)':
numbers.cpp:10:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     if(pos == num.size()) return 1;
      |        ~~~~^~~~~~~~~~~~~

Subtask #1

25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 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	0 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	384 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	1 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

#	결과	실행 시간	메모리	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	388 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	384 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	1 ms	364 KB	Output is correct
10	Correct	0 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	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	384 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	316 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	384 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