CodeForces 374 B. Inna and Nine
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#include <iostream>#include <cstring>#include <cstdio>#include <string>using namespace std;string a;int main(){ unsigned long long int cnt=1; cin>>a; unsigned long long int len=a.size(); unsigned long long int last=1; for(int i=0;i<len;i++) { if(a[i]=='9') continue; if(a[i]+a[i+1]==9+2*'0') last++; else if(last) { if(last%2) cnt*=(last+1)/2; last=1; } } cout<<cnt<<endl; return 0;}
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