#include<bits/stdc++.h> using namespace std; int main(){ int n,i,b,c,d,a=1,h=0; cin>>n; for(a=1;a<=n;a+1){ i=a%10; b=a/10%10; c=a/100%10; d=a/1000; if(i%2==0||i%5==0||b%2==0||b%5==0||c%2==0||c%5==0||d%2==0||d%5==0){ h++; } }cout<<h; return 0; } /************************************************************** Problem: 1395 User: caiqiaoxi Language: C++ Result: Time Limit Exceed ****************************************************************/