답안 #57378

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
57378 2018-07-14T17:26:30 Z RezwanArefin01 Palindrome-Free Numbers (BOI13_numbers) C++17
100 / 100
4 ms 704 KB
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> ii; 

ll dp[20][11][11][2][2]; 
string s; 

ll f(int pos, int a, int b, bool small, bool start) {
	if(pos == s.size()) return 1; 
	ll &ret = dp[pos][a][b][small][start]; 
	if(~ret) return ret; 
	ret = 0; 
	int lim = small ? 9 : s[pos] - '0'; 
	for(int i = 0; i <= lim; i++) {
		if(i == a || i == b) continue; 
		if(!i && start) {
			ret += f(pos + 1, 10, 10, 1, 1); 
		} else {
			ret += f(pos + 1, b, i, small | (i < lim), 0); 
		}
	} return ret; 
}

ll solve(ll n) {
    s = to_string(n); 
    memset(dp, -1, sizeof dp); 
    return f(0, 10, 10, 0, 1); 
}

int main(int argc, char const *argv[]) {
    ll a, b; 
    scanf("%lld %lld", &a, &b); 
    ll ans = solve(b); 
    if(a) ans -= solve(a - 1); 
    printf("%lld\n", ans); 
}

Compilation message

numbers.cpp: In function 'll f(int, int, int, bool, bool)':
numbers.cpp:11:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(pos == s.size()) return 1; 
     ~~~~^~~~~~~~~~~
numbers.cpp: In function 'int main(int, const char**)':
numbers.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld %lld", &a, &b); 
     ~~~~~^~~~~~~~~~~~~~~~~~~~~
# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 520 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 2 ms 624 KB Output is correct
6 Correct 2 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 3 ms 624 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 4 ms 624 KB Output is correct
11 Correct 3 ms 624 KB Output is correct
12 Correct 2 ms 636 KB Output is correct
13 Correct 3 ms 636 KB Output is correct
14 Correct 3 ms 636 KB Output is correct
15 Correct 2 ms 636 KB Output is correct
16 Correct 2 ms 636 KB Output is correct
17 Correct 3 ms 636 KB Output is correct
18 Correct 2 ms 636 KB Output is correct
19 Correct 3 ms 636 KB Output is correct
20 Correct 2 ms 636 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 636 KB Output is correct
2 Correct 3 ms 700 KB Output is correct
3 Correct 3 ms 700 KB Output is correct
4 Correct 3 ms 700 KB Output is correct
5 Correct 3 ms 700 KB Output is correct
6 Correct 2 ms 700 KB Output is correct
7 Correct 3 ms 700 KB Output is correct
8 Correct 3 ms 700 KB Output is correct
9 Correct 2 ms 700 KB Output is correct
10 Correct 2 ms 700 KB Output is correct
11 Correct 2 ms 700 KB Output is correct
12 Correct 3 ms 700 KB Output is correct
13 Correct 3 ms 700 KB Output is correct
14 Correct 2 ms 700 KB Output is correct
15 Correct 2 ms 700 KB Output is correct
16 Correct 3 ms 700 KB Output is correct
17 Correct 4 ms 700 KB Output is correct
18 Correct 2 ms 700 KB Output is correct
19 Correct 3 ms 700 KB Output is correct
20 Correct 3 ms 700 KB Output is correct
21 Correct 3 ms 700 KB Output is correct
22 Correct 3 ms 700 KB Output is correct
23 Correct 3 ms 700 KB Output is correct
24 Correct 3 ms 700 KB Output is correct
25 Correct 3 ms 700 KB Output is correct
26 Correct 3 ms 700 KB Output is correct
27 Correct 3 ms 700 KB Output is correct
28 Correct 3 ms 700 KB Output is correct
29 Correct 3 ms 700 KB Output is correct
30 Correct 3 ms 700 KB Output is correct
31 Correct 3 ms 704 KB Output is correct
32 Correct 2 ms 704 KB Output is correct
33 Correct 2 ms 704 KB Output is correct
34 Correct 3 ms 704 KB Output is correct
35 Correct 3 ms 704 KB Output is correct
36 Correct 3 ms 704 KB Output is correct
37 Correct 3 ms 704 KB Output is correct
38 Correct 3 ms 704 KB Output is correct
39 Correct 3 ms 704 KB Output is correct
40 Correct 3 ms 704 KB Output is correct
41 Correct 4 ms 704 KB Output is correct
42 Correct 3 ms 704 KB Output is correct
43 Correct 2 ms 704 KB Output is correct
44 Correct 3 ms 704 KB Output is correct
45 Correct 3 ms 704 KB Output is correct