22 lines
551 B
C++
22 lines
551 B
C++
#include <cassert>
|
|
#include <iostream>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
std::string rotate(std::string const &s, std::string::size_type amount) {
|
|
auto length = s.length();
|
|
return (s + s).substr(amount % length, length);
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
unsigned count = 0;
|
|
std::string::size_type rotation = 0;
|
|
for (std::string line; std::getline(std::cin, line);) {
|
|
auto rotated = rotate(line, rotation);
|
|
rotation += 3;
|
|
count += (rotated[0] == '#');
|
|
}
|
|
|
|
std::cout << "Number of trees: " << count << "\n";
|
|
return 0;
|
|
} |