#import <stdio.h>
void P(long k){
    printf("%ld",k);
    exit(0);
}
int main() {
    long n,m;
    scanf("%ld %ld",&n,&m);
    if (n==1&&m==1) P(1);
    if (n==1) P(m-2);
    if (m==1) P(n-2);
    P((m-2)*(n-2));
}

; ModuleID = '/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_582/source.m'
source_filename = "/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_582/source.m"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@.str = private unnamed_addr constant [4 x i8] c"%ld\00", align 1
@.str.1 = private unnamed_addr constant [8 x i8] c"%ld %ld\00", align 1

; Function Attrs: noreturn nounwind uwtable
define dso_local void @P(i64 noundef %k) local_unnamed_addr #0 {
entry:
  %call = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef %k)
  tail call void @exit(i32 noundef 0) #4
  unreachable
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: noreturn
declare void @exit(i32 noundef) local_unnamed_addr #2

; Function Attrs: noreturn nounwind uwtable
define dso_local i32 @main() local_unnamed_addr #0 {
entry:
  %n = alloca i64, align 8
  %m = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %n) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %m) #5
  %call = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %n, ptr noundef nonnull %m)
  %0 = load i64, ptr %n, align 8, !tbaa !5
  %cmp = icmp eq i64 %0, 1
  %1 = load i64, ptr %m, align 8
  %cmp1 = icmp eq i64 %1, 1
  %or.cond = select i1 %cmp, i1 %cmp1, i1 false
  br i1 %or.cond, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  %call.i = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef 1)
  call void @exit(i32 noundef 0) #4
  unreachable

if.end:                                           ; preds = %entry
  br i1 %cmp, label %if.then3, label %if.end4

if.then3:                                         ; preds = %if.end
  %sub = add nsw i64 %1, -2
  %call.i11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef %sub)
  call void @exit(i32 noundef 0) #4
  unreachable

if.end4:                                          ; preds = %if.end
  br i1 %cmp1, label %if.then6, label %if.end8

if.then6:                                         ; preds = %if.end4
  %sub7 = add nsw i64 %0, -2
  %call.i13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef %sub7)
  call void @exit(i32 noundef 0) #4
  unreachable

if.end8:                                          ; preds = %if.end4
  %sub9 = add nsw i64 %1, -2
  %sub10 = add nsw i64 %0, -2
  %mul = mul nsw i64 %sub9, %sub10
  %call.i15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef %mul)
  call void @exit(i32 noundef 0) #4
  unreachable
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { noreturn nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { noreturn "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { noreturn nounwind }
attributes #5 = { nounwind }

!llvm.linker.options = !{}
!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"Ubuntu clang version 18.0.0 (++20231007042255+8abb2ace888b-1~exp1~20231007042414.1230)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
