#include <iostream>
using namespace std;
const int TEN = 10;
int main() {
int no, count = 0;
while (no >= 0) {
cin >> no;
--no;
if (no % TEN == 0 ) {
++count;
//cout << no << " ";
}
//cout << no << " ";
}
cout << count;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKY29uc3QgaW50IFRFTiA9IDEwOwoKaW50IG1haW4oKSB7CglpbnQgbm8sIGNvdW50ID0gMDsKCXdoaWxlIChubyA+PSAwKSB7CgkJY2luID4+IG5vOwoJCS0tbm87CgkJaWYgKG5vICUgVEVOID09IDAgKSB7CgkJCSsrY291bnQ7CgkJCS8vY291dCA8PCBubyA8PCAiICI7CgkJCQoJCX0KCQkvL2NvdXQgPDwgbm8gPDwgIiAiOwoJCQoJfQoJY291dCA8PCBjb3VudDsKCXJldHVybiAwOwp9
MTAwCjU5IC0mZ3Q7IDYKNjAgLSZndDsgNgo5OSAtJmd0OyAxMApCdXN0YW1hbnRlIFRoaWFnbwo5OjI04oCvUE0KMCAtJmd0OyAwCgoxIC0mZ3Q7IDEKCjEwIC0mZ3Q7IDIKMTkgCgo5MCAtJmd0OyA5Cgo5OSAtJmd0OyA5CiAKNTUgLSZndDsgNg==
100
59 -> 6
60 -> 6
99 -> 10
Bustamante Thiago
9:24 PM
0 -> 0
1 -> 1
10 -> 2
19
90 -> 9
99 -> 9
55 -> 6