; LLVM IR from DionysiosB/CodeForces :: 1200-1299 (1203A-CircleOfStudents)

; 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 [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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 i8, align 1
  %5 = alloca i8, align 1
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %10

10:                                               ; preds = %74, %0
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = add nsw i64 %11, -1
  store i64 %12, ptr %2, align 8, !tbaa !5
  %13 = icmp ne i64 %11, 0
  br i1 %13, label %14, label %79

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 1, ptr %4) #3
  store i8 1, ptr %4, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #3
  store i8 1, ptr %5, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6)
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 1, ptr %7, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %65, %14
  %18 = load i64, ptr %7, align 8, !tbaa !5
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %68

22:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %23 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %8)
  %24 = load i8, ptr %4, align 1, !tbaa !9, !range !11, !noundef !12
  %25 = trunc i8 %24 to i1
  br i1 %25, label %26, label %43

26:                                               ; preds = %22
  %27 = load i64, ptr %8, align 8, !tbaa !5
  %28 = load i64, ptr %6, align 8, !tbaa !5
  %29 = add nsw i64 %28, 1
  %30 = icmp eq i64 %27, %29
  br i1 %30, label %31, label %32

31:                                               ; preds = %26
  br label %42

32:                                               ; preds = %26
  %33 = load i64, ptr %8, align 8, !tbaa !5
  %34 = icmp eq i64 %33, 1
  br i1 %34, label %35, label %40

35:                                               ; preds = %32
  %36 = load i64, ptr %6, align 8, !tbaa !5
  %37 = load i64, ptr %3, align 8, !tbaa !5
  %38 = icmp eq i64 %36, %37
  br i1 %38, label %39, label %40

39:                                               ; preds = %35
  br label %41

40:                                               ; preds = %35, %32
  store i8 0, ptr %4, align 1, !tbaa !9
  br label %41

41:                                               ; preds = %40, %39
  br label %42

42:                                               ; preds = %41, %31
  br label %43

43:                                               ; preds = %42, %22
  %44 = load i8, ptr %5, align 1, !tbaa !9, !range !11, !noundef !12
  %45 = trunc i8 %44 to i1
  br i1 %45, label %46, label %63

46:                                               ; preds = %43
  %47 = load i64, ptr %8, align 8, !tbaa !5
  %48 = load i64, ptr %6, align 8, !tbaa !5
  %49 = sub nsw i64 %48, 1
  %50 = icmp eq i64 %47, %49
  br i1 %50, label %51, label %52

51:                                               ; preds = %46
  br label %62

52:                                               ; preds = %46
  %53 = load i64, ptr %8, align 8, !tbaa !5
  %54 = load i64, ptr %3, align 8, !tbaa !5
  %55 = icmp eq i64 %53, %54
  br i1 %55, label %56, label %60

56:                                               ; preds = %52
  %57 = load i64, ptr %6, align 8, !tbaa !5
  %58 = icmp eq i64 %57, 1
  br i1 %58, label %59, label %60

59:                                               ; preds = %56
  br label %61

60:                                               ; preds = %56, %52
  store i8 0, ptr %5, align 1, !tbaa !9
  br label %61

61:                                               ; preds = %60, %59
  br label %62

62:                                               ; preds = %61, %51
  br label %63

63:                                               ; preds = %62, %43
  %64 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %64, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %65

65:                                               ; preds = %63
  %66 = load i64, ptr %7, align 8, !tbaa !5
  %67 = add nsw i64 %66, 1
  store i64 %67, ptr %7, align 8, !tbaa !5
  br label %17, !llvm.loop !13

68:                                               ; preds = %21
  %69 = load i8, ptr %4, align 1, !tbaa !9, !range !11, !noundef !12
  %70 = trunc i8 %69 to i1
  br i1 %70, label %74, label %71

71:                                               ; preds = %68
  %72 = load i8, ptr %5, align 1, !tbaa !9, !range !11, !noundef !12
  %73 = trunc i8 %72 to i1
  br label %74

74:                                               ; preds = %71, %68
  %75 = phi i1 [ true, %68 ], [ %73, %71 ]
  %76 = zext i1 %75 to i64
  %77 = select i1 %75, ptr @.str.1, ptr @.str.2
  %78 = call i32 @puts(ptr noundef %77)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %10, !llvm.loop !15

79:                                               ; preds = %10
  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

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 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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 [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 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
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = add nsw i64 %6, -1
  store i64 %7, ptr %1, align 8, !tbaa !5
  %.not19 = icmp eq i64 %6, 0
  br i1 %.not19, label %._crit_edge22, label %.lr.ph21

.lr.ph21:                                         ; preds = %0, %._crit_edge
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %9 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = icmp sgt i64 %10, 1
  br i1 %11, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %38, %.lr.ph21
  %.08.lcssa = phi i8 [ 1, %.lr.ph21 ], [ %.19, %38 ]
  %.07.lcssa = phi i8 [ 1, %.lr.ph21 ], [ %.1, %38 ]
  %12 = trunc nuw i8 %.08.lcssa to i1
  %13 = trunc nuw i8 %.07.lcssa to i1
  %14 = select i1 %12, i1 true, i1 %13
  %15 = select i1 %14, ptr @.str.1, ptr @.str.2
  %16 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %15)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %17 = load i64, ptr %1, align 8, !tbaa !5
  %18 = add nsw i64 %17, -1
  store i64 %18, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %17, 0
  br i1 %.not, label %._crit_edge22, label %.lr.ph21, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph21, %38
  %.017 = phi i64 [ %40, %38 ], [ 1, %.lr.ph21 ]
  %.0716 = phi i8 [ %.1, %38 ], [ 1, %.lr.ph21 ]
  %.0815 = phi i8 [ %.19, %38 ], [ 1, %.lr.ph21 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %4)
  %20 = trunc nuw i8 %.0815 to i1
  %.pre.pre = load i64, ptr %4, align 8, !tbaa !5
  br i1 %20, label %21, label %29

21:                                               ; preds = %.lr.ph
  %22 = load i64, ptr %3, align 8, !tbaa !5
  %23 = add nsw i64 %22, 1
  %24 = icmp eq i64 %.pre.pre, %23
  br i1 %24, label %29, label %25

25:                                               ; preds = %21
  %26 = icmp eq i64 %.pre.pre, 1
  %27 = load i64, ptr %2, align 8
  %28 = icmp eq i64 %22, %27
  %or.cond13 = select i1 %26, i1 %28, i1 false
  %spec.select14 = select i1 %or.cond13, i8 %.0815, i8 0
  br label %29

29:                                               ; preds = %25, %21, %.lr.ph
  %.19 = phi i8 [ %.0815, %21 ], [ %.0815, %.lr.ph ], [ %spec.select14, %25 ]
  %30 = trunc nuw i8 %.0716 to i1
  br i1 %30, label %31, label %._crit_edge23

._crit_edge23:                                    ; preds = %29
  %.pre24 = load i64, ptr %2, align 8, !tbaa !5
  br label %38

31:                                               ; preds = %29
  %32 = load i64, ptr %3, align 8
  %33 = add nsw i64 %32, -1
  %34 = icmp eq i64 %.pre.pre, %33
  %.pre25 = load i64, ptr %2, align 8, !tbaa !5
  br i1 %34, label %38, label %35

35:                                               ; preds = %31
  %36 = icmp eq i64 %.pre.pre, %.pre25
  %37 = icmp eq i64 %32, 1
  %or.cond = and i1 %37, %36
  %spec.select = select i1 %or.cond, i8 %.0716, i8 0
  br label %38

38:                                               ; preds = %._crit_edge23, %35, %31
  %39 = phi i64 [ %.pre25, %31 ], [ %.pre24, %._crit_edge23 ], [ %.pre25, %35 ]
  %.1 = phi i8 [ %.0716, %31 ], [ %.0716, %._crit_edge23 ], [ %spec.select, %35 ]
  store i64 %.pre.pre, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  %40 = add nuw nsw i64 %.017, 1
  %41 = icmp slt i64 %40, %39
  br i1 %41, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge22:                                    ; preds = %._crit_edge, %0
  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

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"}
!11 = distinct !{!11, !10}


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