#include <iostream> using namespace std; int main( ){ int a,h,m,s; cin>>a; h=a/3600; m=(a-h3600)/60; s=(a-h3600)%60; printf("%02d:%02d:%02d",h,m,s); }

#include <iostream> using namespace std; int main( ){ int a,h,m,s; cin>>a; h=a/3600; m=(a-h3600)/60; s=(a-h3600)%60; printf("%02d:%02d:%02d",h,m,s); }

#include <iostream> using namespace std; int main( ){ int a,h,m,s; cin>>a; h=a/3600; m=(a-h3600)/60; s=(a-h3600)%60; printf("%02d:%02d:%02d",h,m,s); }