#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ printf(char *, int, int, int);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int n, h, m, s;
  scanf("%d", &n);
  h = n / (60 * 60);
  n -= h * 60 * 60;
  m = n / 60;
  n -= m * 60;
  s = n;
  printf("%d:%d:%d\n", h, m, s);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    $0xe10,%ecx
cltd
idiv   %ecx
mov    %eax,-0xc(%rbp)
imul   $0x3c,-0xc(%rbp),%eax
imul   $0x3c,%eax,%ecx
mov    -0x8(%rbp),%eax
sub    %ecx,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%eax
mov    $0x3c,%ecx
cltd
idiv   %ecx
mov    %eax,-0x10(%rbp)
imul   $0x3c,-0x10(%rbp),%ecx
mov    -0x8(%rbp),%eax
sub    %ecx,%eax
mov    %eax,-0x8(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0xc(%rbp),%esi
mov    -0x10(%rbp),%edx
mov    -0x14(%rbp),%ecx
lea    0xe77(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
movslq 0x4(%rsp),%rax
imul   $0xffffffff91a2b3c5,%rax,%rsi
shr    $0x20,%rsi
add    %eax,%esi
mov    %esi,%ecx
shr    $0x1f,%ecx
sar    $0xb,%esi
add    %ecx,%esi
imul   $0xfffff1f0,%esi,%ecx
add    %eax,%ecx
movslq %ecx,%rax
imul   $0xffffffff88888889,%rax,%rdx
shr    $0x20,%rdx
add    %eax,%edx
mov    %edx,%ecx
shr    $0x1f,%ecx
sar    $0x5,%edx
add    %ecx,%edx
imul   $0xffffffc4,%edx,%ecx
add    %eax,%ecx
mov    %ecx,0x4(%rsp)
lea    0xe83(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [10 x i8] c"%d:%d:%d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
%7 = load i32, i32* %2
%8 = sdiv i32 %7, 3600
store i32 %8, i32* %3
%9 = load i32, i32* %3
%10 = mul nsw i32 %9, 60
%11 = mul nsw i32 %10, 60
%12 = load i32, i32* %2
%13 = sub nsw i32 %12, %11
store i32 %13, i32* %2
%14 = load i32, i32* %2
%15 = sdiv i32 %14, 60
store i32 %15, i32* %4
%16 = load i32, i32* %4
%17 = mul nsw i32 %16, 60
%18 = load i32, i32* %2
%19 = sub nsw i32 %18, %17
store i32 %19, i32* %2
%20 = load i32, i32* %2
store i32 %20, i32* %5
%21 = load i32, i32* %3
%22 = load i32, i32* %4
%23 = load i32, i32* %5
%24 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32 %21, i32 %22, i32 %23)
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [10 x i8] c"%d:%d:%d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%4 = load i32, i32* %1
%5 = sdiv i32 %4, 3600
%6 = mul nsw i32 %5, -3600
%7 = add i32 %6, %4
%8 = sdiv i32 %7, 60
%9 = mul nsw i32 %8, -60
%10 = add i32 %9, %7
store i32 %10, i32* %1
%11 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32 %5, i32 %8, i32 %10)
ret i32 0
}