49 lines
1.1 KiB
C++
49 lines
1.1 KiB
C++
#include <stdio.h>
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#include <string.h>
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#include <algorithm>
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using namespace std;
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int bit[15];
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int dp[15][15][3];
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int dfs(int pos,int mod,int have,int lim)
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{
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int num,i,ans,mod_x,have_x;
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if(pos<=0)
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return mod == 0 && have == 2;
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if(!lim && dp[pos][mod][have] != -1)
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return dp[pos][mod][have];
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num = lim?bit[pos]:9;
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ans = 0;
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for(i = 0; i<=num; i++)
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{
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mod_x = (mod*10+i)%13;
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have_x = have;
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if(have == 0 && i == 1)
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have_x = 1;
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if(have == 1 && i != 1)
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have_x = 0;
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if(have == 1 && i == 3)
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have_x = 2;
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ans+=dfs(pos-1,mod_x,have_x,lim&&i==num);
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}
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if(!lim)
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dp[pos][mod][have] = ans;
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return ans;
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}
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int main()
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{
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int n,len;
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while(~scanf("%d",&n))
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{
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memset(bit,0,sizeof(bit));
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memset(dp,-1,sizeof(dp));
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len = 0;
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while(n)
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{
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bit[++len] = n%10;
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n/=10;
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}
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printf("%d\n",dfs(len,0,0,1));
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}
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return 0;
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}
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