#include <iostream>
using namespace std;
#include <cmath>
double rndfrom(double num, int n)
{
double p = pow(10,n);
double r = round(num * p);
return r / p;
}
int main() {
// your code goes here
std::cout << rndfrom(2.7, 1) << '\n';
std::cout << rndfrom(36.765, -1) ;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwojaW5jbHVkZSA8Y21hdGg+Cgpkb3VibGUgcm5kZnJvbShkb3VibGUgbnVtLCAgaW50IG4pCnsKICAgIGRvdWJsZSBwID0gcG93KDEwLG4pOwogICAgZG91YmxlIHIgPSByb3VuZChudW0gKiBwKTsKICAgIHJldHVybiByIC8gcDsKfQoKaW50IG1haW4oKSB7CgkvLyB5b3VyIGNvZGUgZ29lcyBoZXJlCglzdGQ6OmNvdXQgPDwgcm5kZnJvbSgyLjcsIDEpIDw8ICdcbic7CiAgICBzdGQ6OmNvdXQgPDwgcm5kZnJvbSgzNi43NjUsIC0xKSA7CgkKCQoJcmV0dXJuIDA7Cn0=