; LLVM IR from DionysiosB/CodeForces :: 0700-0799 (750C-NewYearAndRating)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  store i64 1000000000, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 1900, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %4)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 -1000000000, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 1000000000, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %38, %0
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = add nsw i64 %12, -1
  store i64 %13, ptr %4, align 8, !tbaa !5
  %14 = icmp ne i64 %12, 0
  br i1 %14, label %15, label %42

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %8, ptr noundef %9)
  %17 = load i64, ptr %9, align 8, !tbaa !5
  %18 = icmp eq i64 %17, 1
  br i1 %18, label %19, label %27

19:                                               ; preds = %15
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = load i64, ptr %7, align 8, !tbaa !5
  %22 = add nsw i64 %20, %21
  %23 = icmp slt i64 %22, 1900
  br i1 %23, label %24, label %27

24:                                               ; preds = %19
  %25 = load i64, ptr %7, align 8, !tbaa !5
  %26 = sub nsw i64 1900, %25
  store i64 %26, ptr %5, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %24, %19, %15
  %28 = load i64, ptr %9, align 8, !tbaa !5
  %29 = icmp eq i64 %28, 2
  br i1 %29, label %30, label %38

30:                                               ; preds = %27
  %31 = load i64, ptr %6, align 8, !tbaa !5
  %32 = load i64, ptr %7, align 8, !tbaa !5
  %33 = add nsw i64 %31, %32
  %34 = icmp sge i64 %33, 1900
  br i1 %34, label %35, label %38

35:                                               ; preds = %30
  %36 = load i64, ptr %7, align 8, !tbaa !5
  %37 = sub nsw i64 1899, %36
  store i64 %37, ptr %6, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %35, %30, %27
  %39 = load i64, ptr %8, align 8, !tbaa !5
  %40 = load i64, ptr %7, align 8, !tbaa !5
  %41 = add nsw i64 %40, %39
  store i64 %41, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %11, !llvm.loop !9

42:                                               ; preds = %11
  %43 = load i64, ptr %5, align 8, !tbaa !5
  %44 = load i64, ptr %6, align 8, !tbaa !5
  %45 = icmp sgt i64 %43, %44
  br i1 %45, label %46, label %48

46:                                               ; preds = %42
  %47 = call i32 @puts(ptr noundef @.str.2)
  br label %59

48:                                               ; preds = %42
  %49 = load i64, ptr %6, align 8, !tbaa !5
  %50 = icmp sge i64 %49, 1000000000
  br i1 %50, label %51, label %53

51:                                               ; preds = %48
  %52 = call i32 @puts(ptr noundef @.str.3)
  br label %58

53:                                               ; preds = %48
  %54 = load i64, ptr %6, align 8, !tbaa !5
  %55 = load i64, ptr %7, align 8, !tbaa !5
  %56 = add nsw i64 %54, %55
  %57 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, i64 noundef %56)
  br label %58

58:                                               ; preds = %53, %51
  br label %59

59:                                               ; preds = %58, %46
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  ret i32 0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

declare i32 @puts(ptr noundef) #2

declare i32 @printf(ptr noundef, ...) #2

attributes #0 = { mustprogress norecurse 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = { nounwind }

!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 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [11 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = add nsw i64 %5, -1
  store i64 %6, ptr %1, align 8, !tbaa !5
  %.not18 = icmp eq i64 %5, 0
  br i1 %.not18, label %.thread, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.021 = phi i64 [ %18, %.lr.ph ], [ 0, %0 ]
  %.01220 = phi i64 [ %.1, %.lr.ph ], [ 1000000000, %0 ]
  %.01319 = phi i64 [ %.114, %.lr.ph ], [ -1000000000, %0 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %8 = load i64, ptr %3, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 1
  %10 = add nsw i64 %.021, %.01319
  %11 = icmp slt i64 %10, 1900
  %or.cond = select i1 %9, i1 %11, i1 false
  %12 = sub nsw i64 1900, %.021
  %.114 = select i1 %or.cond, i64 %12, i64 %.01319
  %13 = icmp eq i64 %8, 2
  %14 = add nsw i64 %.021, %.01220
  %15 = icmp sgt i64 %14, 1899
  %or.cond17 = select i1 %13, i1 %15, i1 false
  %16 = sub nsw i64 1899, %.021
  %.1 = select i1 %or.cond17, i64 %16, i64 %.01220
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = add nsw i64 %17, %.021
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %19 = load i64, ptr %1, align 8, !tbaa !5
  %20 = add nsw i64 %19, -1
  store i64 %20, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %19, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  %21 = icmp sgt i64 %.114, %.1
  br i1 %21, label %22, label %24

22:                                               ; preds = %._crit_edge
  %23 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.2)
  br label %30

24:                                               ; preds = %._crit_edge
  %25 = icmp sgt i64 %.1, 999999999
  br i1 %25, label %.thread, label %27

.thread:                                          ; preds = %0, %24
  %26 = call i32 @puts(ptr noundef nonnull dereferenceable(1) @.str.3)
  br label %30

27:                                               ; preds = %24
  %28 = add nsw i64 %18, %.1
  %29 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, i64 noundef %28)
  br label %30

30:                                               ; preds = %.thread, %27, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

attributes #0 = { mustprogress nofree norecurse 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind }

!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 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass