#include <iostream>
#include <string>
using namespace std;
int main() {
string inputs[2] = {"stack overflow", "stack exchange"};
string search_key = "stack";
int count;
for(int i = 0; i <sizeof(inputs)/sizeof(inputs[0]); i++)
{
if (inputs[i].find(search_key) != string::npos)
count++;
}
cout << count;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3RyaW5nPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CglzdHJpbmcgaW5wdXRzWzJdID0geyJzdGFjayBvdmVyZmxvdyIsICJzdGFjayBleGNoYW5nZSJ9OwoJc3RyaW5nIHNlYXJjaF9rZXkgPSAic3RhY2siOwoJaW50IGNvdW50OwoJZm9yKGludCBpID0gMDsgaSA8c2l6ZW9mKGlucHV0cykvc2l6ZW9mKGlucHV0c1swXSk7IGkrKykKCXsKCQlpZiAoaW5wdXRzW2ldLmZpbmQoc2VhcmNoX2tleSkgIT0gc3RyaW5nOjpucG9zKQoJCQljb3VudCsrOwoJfQoJCgljb3V0IDw8IGNvdW50OwoJCglyZXR1cm4gMDsKfQ==