| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 255611 | 2020-08-01T12:35:46 Z | Saboon | Palindrome-Free Numbers (BOI13_numbers) | C++14 | 1 ms | 384 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn = 1e5 + 10;
ll dp[20][12][12];
ll get(string s){
if (s.size() == 1)
return stoi(s) + 1;
int n = s.size();
ll ret = 0;
for (int i = 1; i <= n-1; i++)
ret += 9ll * dp[i][10][1];
ret ++;
for (int i = 0; i < n; i++){
for (char c = '0'; c < s[i]; c++){
if (i == 0 and c == '0')
continue;
if (i > 0 and c == s[i-1])
continue;
if (i > 1 and c == s[i-2])
continue;
if (i == 0)
ret += dp[n-i][10][(int)(c-'0')];
else
ret += dp[n-i+1][(int)(s[i-1]-'0')][(int)(c-'0')];
}
if (i > 0 and s[i] == s[i-1])
break;
if (i > 1 and s[i] == s[i-2])
break;
if (i == n-1)
ret ++;
}
return ret;
}
bool check(string s){
for (int i = 1; i < s.size(); i++)
if (s[i] == s[i-1])
return false;
for (int i = 2; i < s.size(); i++)
if (s[i] == s[i-2])
return false;
return true;
}
int main(){
ios_base::sync_with_stdio(false);
for (int i = 0; i <= 9; i++)
dp[1][10][i] = 1;
for (int a = 0; a < 10; a++)
for (int b = 0; b < 10; b++)
if (a != b)
dp[2][a][b] = 1;
for (int len = 2; len <= 19; len++){
for (int a = 0; a < 10; a++){
for (int b = 0; b < 10; b++){
if (a == b)
continue;
for (int c = 0; c < 10; c++){
if (a == b or b == c)
continue;
dp[len][a][b] += dp[len-1][c][a];
}
}
}
for (int b = 0; b < 10; b++){
for (int c = 0; c < 10; c++){
if (b == c)
continue;
dp[len][10][b] += dp[len][b][c];
}
}
}
ll l, r;
cin >> l >> r;
string a = to_string(r), b = to_string(l-1);
if (l == 0)
return cout << get(a) << endl, 0;
cout << get(a) - get(b) << endl;
}
Compilation message
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 0 ms | 384 KB | Output is correct |
| 2 | Correct | 0 ms | 384 KB | Output is correct |
| 3 | Correct | 1 ms | 384 KB | Output is correct |
| 4 | Correct | 0 ms | 384 KB | Output is correct |
| 5 | Correct | 0 ms | 384 KB | Output is correct |
| 6 | Correct | 0 ms | 384 KB | Output is correct |
| 7 | Correct | 0 ms | 384 KB | Output is correct |
| 8 | Correct | 0 ms | 384 KB | Output is correct |
| 9 | Correct | 1 ms | 384 KB | Output is correct |
| 10 | Correct | 0 ms | 384 KB | Output is correct |
| 11 | Correct | 0 ms | 384 KB | Output is correct |
| 12 | Correct | 1 ms | 384 KB | Output is correct |
| 13 | Correct | 0 ms | 384 KB | Output is correct |
| 14 | Correct | 0 ms | 384 KB | Output is correct |
| 15 | Correct | 0 ms | 384 KB | Output is correct |
| 16 | Correct | 1 ms | 384 KB | Output is correct |
| 17 | Correct | 0 ms | 384 KB | Output is correct |
| 18 | Correct | 0 ms | 384 KB | Output is correct |
| 19 | Correct | 1 ms | 384 KB | Output is correct |
| 20 | Correct | 1 ms | 384 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 0 ms | 384 KB | Output is correct |
| 2 | Correct | 0 ms | 384 KB | Output is correct |
| 3 | Correct | 0 ms | 384 KB | Output is correct |
| 4 | Correct | 0 ms | 384 KB | Output is correct |
| 5 | Correct | 0 ms | 384 KB | Output is correct |
| 6 | Correct | 0 ms | 384 KB | Output is correct |
| 7 | Correct | 0 ms | 384 KB | Output is correct |
| 8 | Correct | 0 ms | 384 KB | Output is correct |
| 9 | Correct | 0 ms | 384 KB | Output is correct |
| 10 | Correct | 0 ms | 384 KB | Output is correct |
| 11 | Correct | 0 ms | 384 KB | Output is correct |
| 12 | Correct | 0 ms | 384 KB | Output is correct |
| 13 | Correct | 1 ms | 384 KB | Output is correct |
| 14 | Correct | 0 ms | 384 KB | Output is correct |
| 15 | Correct | 0 ms | 384 KB | Output is correct |
| 16 | Correct | 0 ms | 384 KB | Output is correct |
| 17 | Correct | 0 ms | 384 KB | Output is correct |
| 18 | Correct | 1 ms | 384 KB | Output is correct |
| 19 | Correct | 0 ms | 384 KB | Output is correct |
| 20 | Correct | 0 ms | 384 KB | Output is correct |
| 21 | Correct | 0 ms | 384 KB | Output is correct |
| 22 | Correct | 1 ms | 384 KB | Output is correct |
| 23 | Correct | 1 ms | 384 KB | Output is correct |
| 24 | Correct | 0 ms | 384 KB | Output is correct |
| 25 | Correct | 0 ms | 384 KB | Output is correct |
| 26 | Correct | 1 ms | 384 KB | Output is correct |
| 27 | Correct | 1 ms | 384 KB | Output is correct |
| 28 | Correct | 1 ms | 384 KB | Output is correct |
| 29 | Correct | 0 ms | 384 KB | Output is correct |
| 30 | Correct | 1 ms | 384 KB | Output is correct |
| 31 | Correct | 1 ms | 384 KB | Output is correct |
| 32 | Correct | 0 ms | 384 KB | Output is correct |
| 33 | Correct | 0 ms | 384 KB | Output is correct |
| 34 | Correct | 0 ms | 384 KB | Output is correct |
| 35 | Correct | 0 ms | 384 KB | Output is correct |
| 36 | Correct | 0 ms | 384 KB | Output is correct |
| 37 | Correct | 0 ms | 384 KB | Output is correct |
| 38 | Correct | 1 ms | 384 KB | Output is correct |
| 39 | Correct | 0 ms | 384 KB | Output is correct |
| 40 | Correct | 1 ms | 384 KB | Output is correct |
| 41 | Correct | 0 ms | 384 KB | Output is correct |
| 42 | Correct | 0 ms | 384 KB | Output is correct |
| 43 | Correct | 0 ms | 384 KB | Output is correct |
| 44 | Correct | 0 ms | 384 KB | Output is correct |
| 45 | Correct | 0 ms | 384 KB | Output is correct |