Submission #558783

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
558783	2022-05-08T10:30:00 Z	mr_slappy	Palindrome-Free Numbers (BOI13_numbers)	C++14	100 / 100	1 ms	340 KB

numbers

#include "bits/stdc++.h"
#define int long long
using namespace std;
int n;
int a[20];
int dp[20][2][11][11];

int cnt(int pos,int k,int fi,int se)
{
	// cout<<pos<<' '<<k<<" "<<fi<<" "<<se<<'\n';
	if(pos==n) return 1;
	if(dp[pos][k][fi][se]!=-1) return dp[pos][k][fi][se];
	int upper=a[pos];
	if(k) upper=9;
	int ans=0;
	for(int i=0;i<=upper;i++)
	{
		if(i==fi or i==se) continue;
		if(i==0 and fi==10 and se==10)
		{
			ans+=cnt(pos+1,1,fi,se);
		}
		else
		{
			ans+=cnt(pos+1,(k or i<a[pos]),se,i);
		}
	}
	return dp[pos][k][fi][se]=ans;
}

int solve(int x)
{
	memset(dp,-1,sizeof(dp));
	n=0;
	while(x)
	{
		a[n++]=x%10;
		x/=10;
	}
	reverse(a,a+n);
	return cnt(0,0,10,10);
}

signed main()
{
	int l,r;
	cin>>l>>r;
	cout<<solve(r)-solve(l-1);
	return 0;
}

Subtask #1

25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 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	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	1 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	304 KB	Output is correct
11	Correct	1 ms	308 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	1 ms	304 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	304 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct

Subtask #2

75.0 / 75.0

#	Verdict	Execution time	Memory	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	340 KB	Output is correct
5	Correct	1 ms	308 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	1 ms	300 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	1 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	300 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	212 KB	Output is correct
19	Correct	1 ms	304 KB	Output is correct
20	Correct	1 ms	300 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	304 KB	Output is correct
24	Correct	1 ms	340 KB	Output is correct
25	Correct	1 ms	304 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	308 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	340 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	300 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	308 KB	Output is correct
45	Correct	1 ms	340 KB	Output is correct