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#include<bits/stdc++.h>
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using namespace std;
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int main() {
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int ans=0,i,n,x,tmp;
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cin>>n>>x;
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for(int i=1; i<=n; i++) {
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tmp=i;
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while(tmp>=1) {
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if(tmp%10==x) ans++;
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tmp/=10;
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}
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}
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cout<<ans;
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return 0;
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}
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