#include <iostream>
using namespace std;
int main() {
int n;
cin >> n;
string sheeps[n] = {};
for(int i = 0; i < n; i++)
cin >> sheeps[i];
int count = 0;
for(int i = 0; i < n; i++)
(sheeps[i] == "true")? count++ : 0;
cout << count << endl;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CglpbnQgbjsKCWNpbiA+PiBuOwoJc3RyaW5nIHNoZWVwc1tuXSA9IHt9OwoJCglmb3IoaW50IGkgPSAwOyBpIDwgbjsgaSsrKQoJCWNpbiA+PiBzaGVlcHNbaV07CgkJCglpbnQgY291bnQgPSAwOwoJZm9yKGludCBpID0gMDsgaSA8IG47IGkrKykKCQkoc2hlZXBzW2ldID09ICJ0cnVlIik/IGNvdW50KysgOiAwOwoJCQoJY291dCA8PCBjb3VudCA8PCBlbmRsOwoJcmV0dXJuIDA7Cn0=