#include #define rep(i,n) for(int i = 0; i < (n); ++i) #define srep(i,s,t) for (int i = s; i < t; ++i) #define drep(i,n) for(int i = (n)-1; i >= 0; --i) using namespace std; typedef long long int ll; typedef pair P; #define yn {puts("Yes");}else{puts("No");} #define MAX_N 200005 int main() { int a; cin >> a; a /= 10; a *= 6; int h = 10 + a / 60; int m = a % 60; cout << h << ':'; cout << setfill('0') << right << setw(2) << m << endl; return 0; }