; LLVM IR from tangjz/acm-icpc :: lydsy (3028)

; 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"

@n = external dso_local global i32, align 4
@str = external dso_local global [501 x i8], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

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

4:                                                ; preds = %25, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [501 x i8], ptr @str, i64 0, i64 %6
  %8 = load i8, ptr %7, align 1, !tbaa !9
  %9 = icmp ne i8 %8, 0
  br i1 %9, label %11, label %10

10:                                               ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %28

11:                                               ; preds = %4
  %12 = load i32, ptr @n, align 4, !tbaa !5
  %13 = shl i32 %12, 3
  %14 = load i32, ptr @n, align 4, !tbaa !5
  %15 = shl i32 %14, 1
  %16 = add nsw i32 %13, %15
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [501 x i8], ptr @str, i64 0, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !9
  %21 = sext i8 %20 to i32
  %22 = add nsw i32 %16, %21
  %23 = sub nsw i32 %22, 48
  %24 = srem i32 %23, 10007
  store i32 %24, ptr @n, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %11
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !10

28:                                               ; preds = %10
  %29 = load i32, ptr @n, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = load i32, ptr @n, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = add nsw i64 %32, 1
  %34 = mul nsw i64 %30, %33
  %35 = load i32, ptr @n, align 4, !tbaa !5
  %36 = add nsw i32 %35, 2
  %37 = sext i32 %36 to i64
  %38 = mul nsw i64 %34, %37
  %39 = mul nsw i64 %38, 1668
  %40 = srem i64 %39, 10007
  %41 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %40)
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

declare i32 @printf(ptr noundef, ...) #1

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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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"

@n = external dso_local local_unnamed_addr global i32, align 4
@str = external dso_local global [501 x i8], align 16
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @str)
  %n.promoted = load i32, ptr @n, align 4, !tbaa !5
  %2 = load i8, ptr @str, align 16, !tbaa !9
  %.not4 = icmp eq i8 %2, 0
  br i1 %.not4, label %3, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph
  store i32 %20, ptr @n, align 4, !tbaa !5
  br label %3

3:                                                ; preds = %._crit_edge, %0
  %4 = phi i32 [ %20, %._crit_edge ], [ %n.promoted, %0 ]
  %5 = sext i32 %4 to i64
  %6 = add nsw i64 %5, 1
  %7 = add nsw i32 %4, 2
  %8 = sext i32 %7 to i64
  %9 = mul nsw i64 %5, 1668
  %10 = mul i64 %9, %6
  %11 = mul i64 %10, %8
  %12 = srem i64 %11, 10007
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %12)
  ret i32 0

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %14 = phi i8 [ %22, %.lr.ph ], [ %2, %0 ]
  %15 = phi i32 [ %20, %.lr.ph ], [ %n.promoted, %0 ]
  %16 = mul i32 %15, 10
  %17 = sext i8 %14 to i32
  %18 = add nsw i32 %17, -48
  %19 = add i32 %18, %16
  %20 = srem i32 %19, 10007
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %21 = getelementptr inbounds [501 x i8], ptr @str, i64 0, i64 %indvars.iv.next
  %22 = load i8, ptr %21, align 1, !tbaa !9
  %.not = icmp eq i8 %22, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10
}

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

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

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 = { 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" }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass