#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 /*<<< orphan*/ scanf(char *, int *, char *, int *);
scalar_t__ strcmp(char *, char *);
int main() {
  char operator[3];
  int first_num, second_num;
  scanf("%d %s %d", &first_num, operator, & second_num);
  if (strcmp(operator, "add") == 0) {
    printf("%d", first_num + second_num);
  } else if (strcmp(operator, "sub") == 0) {
    printf("%d", first_num - second_num);
  } else if (strcmp(operator, "mul") == 0) {
    printf("%d", first_num * second_num);
  } else if (strcmp(operator, "div") == 0) {
    if (second_num == 0) {
      printf("error");
    } else {
      printf("%d", first_num / second_num);
    }
  } else if (strcmp(operator, "mod") == 0) {
    if (second_num == 0) {
      printf("error");
    } else {
      printf("%d", first_num % second_num);
    }
  } else {
    printf("error");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x7(%rbp),%rdx
lea    0xeb6(%rip),%rdi
lea    -0xc(%rbp),%rsi
lea    -0x10(%rbp),%rcx
call   1050 <scanf@plt>
lea    -0x7(%rbp),%rdi
lea    0xea7(%rip),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%rax
jne    118a <main+0x5a>
mov    -0xc(%rbp),%esi
add    -0x10(%rbp),%esi
lea    0xe88(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    12b9 <main+0x189>
lea    -0x7(%rbp),%rdi
lea    0xe78(%rip),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%rax
jne    11bd <main+0x8d>
mov    -0xc(%rbp),%esi
sub    -0x10(%rbp),%esi
lea    0xe55(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    12b4 <main+0x184>
lea    -0x7(%rbp),%rdi
lea    0xe49(%rip),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%rax
jne    11f1 <main+0xc1>
mov    -0xc(%rbp),%esi
imul   -0x10(%rbp),%esi
lea    0xe21(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    12af <main+0x17f>
lea    -0x7(%rbp),%rdi
lea    0xe19(%rip),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%rax
jne    1244 <main+0x114>
cmpl   $0x0,-0x10(%rbp)
jne    1228 <main+0xf8>
lea    0xdfd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    123f <main+0x10f>
mov    -0xc(%rbp),%eax
cltd
idivl  -0x10(%rbp)
mov    %eax,%esi
lea    0xdce(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    12aa <main+0x17a>
lea    -0x7(%rbp),%rdi
lea    0xdd0(%rip),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%rax
jne    1297 <main+0x167>
cmpl   $0x0,-0x10(%rbp)
jne    127b <main+0x14b>
lea    0xdaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1292 <main+0x162>
mov    -0xc(%rbp),%eax
cltd
idivl  -0x10(%rbp)
mov    %edx,%esi
lea    0xd7b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    12a5 <main+0x175>
lea    0xd7b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    12aa <main+0x17a>
jmp    12af <main+0x17f>
jmp    12b4 <main+0x184>
jmp    12b9 <main+0x189>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xec4(%rip),%rdi
lea    0xc(%rsp),%rsi
lea    0x5(%rsp),%rbx
lea    0x8(%rsp),%rcx
mov    %rbx,%rdx
call   1050 <scanf@plt>
lea    0xeaf(%rip),%rsi
mov    %rbx,%rdi
call   1040 <strcmp@plt>
test   %rax,%rax
je     11d9 <main+0xa9>
lea    0xe9f(%rip),%rsi
lea    0x5(%rsp),%rdi
call   1040 <strcmp@plt>
test   %rax,%rax
je     11e3 <main+0xb3>
lea    0xe8d(%rip),%rsi
lea    0x5(%rsp),%rdi
call   1040 <strcmp@plt>
test   %rax,%rax
je     11ed <main+0xbd>
lea    0xe7b(%rip),%rsi
lea    0x5(%rsp),%rdi
call   1040 <strcmp@plt>
test   %rax,%rax
je     120c <main+0xdc>
lea    0xe6f(%rip),%rsi
lea    0x5(%rsp),%rdi
call   1040 <strcmp@plt>
test   %rax,%rax
jne    1226 <main+0xf6>
mov    0x8(%rsp),%ecx
test   %ecx,%ecx
je     1226 <main+0xf6>
mov    0xc(%rsp),%eax
cltd
idiv   %ecx
lea    0xe31(%rip),%rdi
mov    %edx,%esi
jmp    11fd <main+0xcd>
mov    0x8(%rsp),%esi
add    0xc(%rsp),%esi
jmp    11f6 <main+0xc6>
mov    0xc(%rsp),%esi
sub    0x8(%rsp),%esi
jmp    11f6 <main+0xc6>
mov    0x8(%rsp),%esi
imul   0xc(%rsp),%esi
lea    0xe09(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret
mov    0x8(%rsp),%ecx
test   %ecx,%ecx
je     1226 <main+0xf6>
mov    0xc(%rsp),%eax
cltd
idiv   %ecx
lea    0xde4(%rip),%rdi
mov    %eax,%esi
jmp    11fd <main+0xcd>
lea    0xdec(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
jmp    1204 <main+0xd4>

LLVM IR (-O0):
@.str = [9 x i8] c"%d %s %d\00"
@.str.1 = [4 x i8] c"add\00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [4 x i8] c"sub\00"
@.str.4 = [4 x i8] c"mul\00"
@.str.5 = [4 x i8] c"div\00"
@.str.6 = [6 x i8] c"error\00"
@.str.7 = [4 x i8] c"mod\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [3 x i8]
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = getelementptr inbounds [3 x i8], [3 x i8]* %2, i64 0, i64 0
%6 = call i32 @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32* %3, i8* %5, i32* %4)
%7 = getelementptr inbounds [3 x i8], [3 x i8]* %2, i64 0, i64 0
%8 = call i64 @strcmp(i8* %7, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
%9 = icmp eq i64 %8, 0
br i1 %9, label %10, label %15
10: ; preds = %0
%11 = load i32, i32* %3
%12 = load i32, i32* %4
%13 = add nsw i32 %11, %12
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %13)
br label %69
15: ; preds = %0
%16 = getelementptr inbounds [3 x i8], [3 x i8]* %2, i64 0, i64 0
%17 = call i64 @strcmp(i8* %16, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0))
%18 = icmp eq i64 %17, 0
br i1 %18, label %19, label %24
19: ; preds = %15
%20 = load i32, i32* %3
%21 = load i32, i32* %4
%22 = sub nsw i32 %20, %21
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %22)
br label %68
24: ; preds = %15
%25 = getelementptr inbounds [3 x i8], [3 x i8]* %2, i64 0, i64 0
%26 = call i64 @strcmp(i8* %25, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%27 = icmp eq i64 %26, 0
br i1 %27, label %28, label %33
28: ; preds = %24
%29 = load i32, i32* %3
%30 = load i32, i32* %4
%31 = mul nsw i32 %29, %30
%32 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %31)
br label %67
33: ; preds = %24
%34 = getelementptr inbounds [3 x i8], [3 x i8]* %2, i64 0, i64 0
%35 = call i64 @strcmp(i8* %34, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0))
%36 = icmp eq i64 %35, 0
br i1 %36, label %37, label %48
37: ; preds = %33
%38 = load i32, i32* %4
%39 = icmp eq i32 %38, 0
br i1 %39, label %40, label %42
40: ; preds = %37
%41 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
br label %47
42: ; preds = %37
%43 = load i32, i32* %3
%44 = load i32, i32* %4
%45 = sdiv i32 %43, %44
%46 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %45)
br label %47
47: ; preds = %42, %40
br label %66
48: ; preds = %33
%49 = getelementptr inbounds [3 x i8], [3 x i8]* %2, i64 0, i64 0
%50 = call i64 @strcmp(i8* %49, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0))
%51 = icmp eq i64 %50, 0
br i1 %51, label %52, label %63
52: ; preds = %48
%53 = load i32, i32* %4
%54 = icmp eq i32 %53, 0
br i1 %54, label %55, label %57
55: ; preds = %52
%56 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
br label %62
57: ; preds = %52
%58 = load i32, i32* %3
%59 = load i32, i32* %4
%60 = srem i32 %58, %59
%61 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %60)
br label %62
62: ; preds = %57, %55
br label %65
63: ; preds = %48
%64 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
br label %65
65: ; preds = %63, %62
br label %66
66: ; preds = %65, %47
br label %67
67: ; preds = %66, %28
br label %68
68: ; preds = %67, %19
br label %69
69: ; preds = %68, %10
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"%d %s %d\00"
@.str.1 = [4 x i8] c"add\00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [4 x i8] c"sub\00"
@.str.4 = [4 x i8] c"mul\00"
@.str.5 = [4 x i8] c"div\00"
@.str.6 = [6 x i8] c"error\00"
@.str.7 = [4 x i8] c"mod\00"
define i32 @main() {
%1 = alloca [3 x i8]
%2 = alloca i32
%3 = alloca i32
%4 = getelementptr inbounds [3 x i8], [3 x i8]* %1, i64 0, i64 0
%5 = bitcast i32* %2 to i8*
%6 = bitcast i32* %3 to i8*
%7 = call i32 @scanf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32* %2, i8* %4, i32* %3)
%8 = call i64 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
%9 = icmp eq i64 %8, 0
br i1 %9, label %10, label %15
10: ; preds = %0
%11 = load i32, i32* %2
%12 = load i32, i32* %3
%13 = add nsw i32 %12, %11
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %13)
br label %57
15: ; preds = %0
%16 = call i64 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0))
%17 = icmp eq i64 %16, 0
br i1 %17, label %18, label %23
18: ; preds = %15
%19 = load i32, i32* %2
%20 = load i32, i32* %3
%21 = sub nsw i32 %19, %20
%22 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %21)
br label %57
23: ; preds = %15
%24 = call i64 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%25 = icmp eq i64 %24, 0
br i1 %25, label %26, label %31
26: ; preds = %23
%27 = load i32, i32* %2
%28 = load i32, i32* %3
%29 = mul nsw i32 %28, %27
%30 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %29)
br label %57
31: ; preds = %23
%32 = call i64 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0))
%33 = icmp eq i64 %32, 0
br i1 %33, label %34, label %43
34: ; preds = %31
%35 = load i32, i32* %3
%36 = icmp eq i32 %35, 0
br i1 %36, label %37, label %39
37: ; preds = %34
%38 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
br label %57
39: ; preds = %34
%40 = load i32, i32* %2
%41 = sdiv i32 %40, %35
%42 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %41)
br label %57
43: ; preds = %31
%44 = call i64 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0))
%45 = icmp eq i64 %44, 0
br i1 %45, label %46, label %55
46: ; preds = %43
%47 = load i32, i32* %3
%48 = icmp eq i32 %47, 0
br i1 %48, label %49, label %51
49: ; preds = %46
%50 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
br label %57
51: ; preds = %46
%52 = load i32, i32* %2
%53 = srem i32 %52, %47
%54 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32 %53)
br label %57
55: ; preds = %43
%56 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
br label %57
57: ; preds = %18, %39, %37, %49, %51, %55, %26, %10
ret i32 0
}