//IaMaNanBord//

#include <bits/stdc++.h>
using namespace std;

//Macro Shorthands
#define F                       first
#define S                       second
#define f(i,n)                  for(ll i=0;i<=n;i++)
#define rf(i,n)                 for(ll i=n;i>=0;i--)
#define Cf(i,a,b)               for(ll i=a;i<=b;i++)
#define Crf(i,b,a)              for(ll i=b;i>=a;i--)
#define endl                    '\n'           
#define pb                      push_back
#define mp                      make_pair
#define z                       ((ll)1e9 + 7 )  
#define every(it,x)             for(auto &it:x)
#define SET(it,x)               for(auto &it:x){cin>>it;}
#define ins                     insert
#define INF						((ll)1e18)
#define Test                    ll t; cin>>t; while(t--)
#define all(v)                  v.begin(),v.end()
#define nline                   cout<<endl
#define SZ(v)                   (ll)v.size()

 
//Macro Shorthands
#ifndef ONLINE_JUDGE
    #define revelio(args...)        { string _s = #args; replace(_s.begin(), _s.end(), ',', ' ');stringstream _ss(_s); istream_iterator<string> _it(_ss); err(_it, args); }
#else
    #define revelio(args...)        {}
#endif

void err(istream_iterator<string> it) {}
template<typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args) {cerr << *it << " = " << a << endl; err(++it, args...);}

//Data types
typedef long long               ll;
typedef vector<ll>              vll;
typedef vector<string>          vstr;
typedef vector<char>            vchar;
typedef vector<pair<ll,ll> >    vpll;
typedef set<ll>                 sll;
typedef set<string>             sstr;
typedef set<pair<ll,ll> >       spll;
typedef map<ll,ll>              mllll;
typedef map<string,ll>          mstrll;
typedef queue<ll>               qll;


//Functions
ll powMod(ll x,ll y)            {ll p=1; while(y){if(y%2){p=(p*x)%z;} y/=2; x=(x*x)%z;} return p;}
ll CpowMod(ll x,ll y, ll w)     {ll p=1; while(y){if(y%2){p=(p*x)%w;} y/=2; x=(x*x)%w;}return p;}
ll invMod(ll x)                 {return powMod(x,z-2);}
ll CinvMod(ll x,ll w)           {return CpowMod(x,w-2,w);}
ll gcd(ll a, ll b)              {return b == 0 ? a : gcd(b, a % b);}
// ll exGcd(ll a,ll b,ll &x, ll &y){if(b==0){y = 0;x = 1;return a;}ll xtmp, ytmp;ll g = exGcd(b,a%b,xtmp,ytmp);
//                                 x=ytmp; y = xtmp - (a/b)*ytmp;return g;}
// vll sub;
// void subSet(ll k,ll n)          {if(k==n+1){every(it,sub)cout<<it<<" ";cout<<endl;}
//                                 else{sub.pb(k);subSet(k+1,n);
//                                 sub.pop_back();subSet(k+1,n);}}

// vll perm; const ll N = (ll)2e6 ;bool isSelected[N];
// void permut(ll n)               {if(perm.size()==n){every(it,perm)cout<<it<<" ";cout<<endl;}
//                                 else{Cf(i,1,n){if(isSelected[i])continue;perm.pb(i);
//                                 isSelected[i]=1;permut(n);perm.pop_back();isSelected[i] =0;}}} 
// (a^2 + b^2)*(a+b) = K;
// => (a^2 + b^2)*(a+b)*(a-b) = K*(a-b) = a^4 - b^4;
// => a^4-K*a = b^4-k*a ;  



void solve(){
    ll n;
    cin>>n;
    ll s = n%60;
    ll m = (n/60)%60;
    ll h = (n/3600);
    cout<<h<<":"<<m<<":"<<s<<endl;
}


int main(){
    ios_base::sync_with_stdio(0) ;
    cin.tie(0) ; cout.tie(0) ;
    cout.precision(20);

//     #ifndef ONLINE_JUDGE
//     freopen("input.txt", "r", stdin);
//     freopen("output.txt", "w", stdout);
// 	freopen("error.txt","w",stderr);
//     #else
    
//     #endif
    solve();
    // #ifndef ONLINE_JUDGE
    //     cout<<"\nTime Elapsed: "<<1.0*clock()/ CLOCKS_PER_SEC<<" Sec\n";
    // #endif
    return 0;
}


Measured memory_bytes: 3176