#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*/ scanf(char *, int *, int *);
int main() {
  int nodes;
  int edges;
  int node_1;
  int node_2;
  scanf("%d %d", &nodes, &edges);
  for (int i = 0; i < edges; i++) {
    scanf("%d %d", &node_1, &node_2);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeda(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1030 <scanf@plt>
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1168 <main+0x58>
lea    0xeb3(%rip),%rdi
lea    -0x10(%rbp),%rsi
lea    -0x14(%rbp),%rdx
call   1030 <scanf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    113a <main+0x2a>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
sub    $0x18,%rsp
lea    0xedf(%rip),%rdi
lea    0x14(%rsp),%rsi
lea    0x8(%rsp),%rdx
call   1030 <scanf@plt>
cmpl   $0x0,0x8(%rsp)
jle    1167 <main+0x57>
xor    %ebp,%ebp
lea    0xec0(%rip),%r14
lea    0x10(%rsp),%r15
lea    0xc(%rsp),%rbx
nopw   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %r15,%rsi
mov    %rbx,%rdx
call   1030 <scanf@plt>
add    $0x1,%ebp
cmp    0x8(%rsp),%ebp
jl     1150 <main+0x40>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [6 x i8] c"%d %d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = alloca i32
store i32 0, i32* %1
%7 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32* %2, i32* %3)
store i32 0, i32* %6
br label %8
8: ; preds = %14, %0
%9 = load i32, i32* %6
%10 = load i32, i32* %3
%11 = icmp slt i32 %9, %10
br i1 %11, label %12, label %17
12: ; preds = %8
%13 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32* %4, i32* %5)
br label %14
14: ; preds = %12
%15 = load i32, i32* %6
%16 = add nsw i32 %15, 1
store i32 %16, i32* %6
br label %8
17: ; preds = %8
%18 = load i32, i32* %1
ret i32 %18
}

LLVM IR (-O2):
@.str = [6 x i8] c"%d %d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = bitcast i32* %1 to i8*
%6 = bitcast i32* %2 to i8*
%7 = bitcast i32* %3 to i8*
%8 = bitcast i32* %4 to i8*
%9 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32* %1, i32* %2)
%10 = load i32, i32* %2
%11 = icmp sgt i32 %10, 0
br i1 %11, label %13, label %12
12: ; preds = %13, %0
ret i32 0
13: ; preds = %0, %13
%14 = phi i32 [ %16, %13 ], [ 0, %0 ]
%15 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32* %3, i32* %4)
%16 = add nuw nsw i32 %14, 1
%17 = load i32, i32* %2
%18 = icmp slt i32 %16, %17
br i1 %18, label %13, label %12
}