; LLVM IR from tangjz/acm-icpc :: lydsy (1680)

; 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 i64, align 8
@s = external dso_local global i64, align 8
@c = external dso_local global i64, align 8
@y = external dso_local global i64, align 8
@tmp = external dso_local global i64, align 8
@ans = external dso_local global i64, align 8
@.str = external hidden unnamed_addr constant [10 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 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 @n, ptr noundef @s)
  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 = %32, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = load i64, ptr @n, align 8, !tbaa !9
  %8 = icmp slt i64 %6, %7
  br i1 %8, label %10, label %9

9:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %35

10:                                               ; preds = %4
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef @c, ptr noundef @y)
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %16, label %14

14:                                               ; preds = %10
  %15 = load i64, ptr @c, align 8, !tbaa !9
  store i64 %15, ptr @tmp, align 8, !tbaa !9
  br label %20

16:                                               ; preds = %10
  %17 = load i64, ptr @s, align 8, !tbaa !9
  %18 = load i64, ptr @tmp, align 8, !tbaa !9
  %19 = add nsw i64 %18, %17
  store i64 %19, ptr @tmp, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %16, %14
  %21 = load i64, ptr @tmp, align 8, !tbaa !9
  %22 = load i64, ptr @c, align 8, !tbaa !9
  %23 = icmp sgt i64 %21, %22
  br i1 %23, label %24, label %26

24:                                               ; preds = %20
  %25 = load i64, ptr @c, align 8, !tbaa !9
  store i64 %25, ptr @tmp, align 8, !tbaa !9
  br label %26

26:                                               ; preds = %24, %20
  %27 = load i64, ptr @tmp, align 8, !tbaa !9
  %28 = load i64, ptr @y, align 8, !tbaa !9
  %29 = mul nsw i64 %27, %28
  %30 = load i64, ptr @ans, align 8, !tbaa !9
  %31 = add nsw i64 %30, %29
  store i64 %31, ptr @ans, align 8, !tbaa !9
  br label %32

32:                                               ; preds = %26
  %33 = load i32, ptr %2, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !11

35:                                               ; preds = %9
  %36 = load i64, ptr @ans, align 8, !tbaa !9
  %37 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %36)
  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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 global i64, align 8
@s = external dso_local global i64, align 8
@c = external dso_local global i64, align 8
@y = external dso_local global i64, align 8
@tmp = external dso_local local_unnamed_addr global i64, align 8
@ans = external dso_local local_unnamed_addr global i64, align 8
@.str = external hidden unnamed_addr constant [10 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [9 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 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 @n, ptr noundef nonnull @s)
  %2 = load i64, ptr @n, align 8, !tbaa !5
  %3 = icmp sgt i64 %2, 0
  br i1 %3, label %.lr.ph.preheader, label %.._crit_edge_crit_edge

.._crit_edge_crit_edge:                           ; preds = %0
  %.pre = load i64, ptr @ans, align 8, !tbaa !5
  br label %._crit_edge

.lr.ph.preheader:                                 ; preds = %0
  %4 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull @c, ptr noundef nonnull @y)
  %5 = load i64, ptr @c, align 8
  store i64 %5, ptr @tmp, align 8
  %6 = load i64, ptr @y, align 8, !tbaa !5
  %7 = mul nsw i64 %5, %6
  %8 = load i64, ptr @ans, align 8, !tbaa !5
  %9 = add nsw i64 %7, %8
  store i64 %9, ptr @ans, align 8, !tbaa !5
  %10 = load i64, ptr @n, align 8, !tbaa !5
  %11 = icmp sgt i64 %10, 1
  br i1 %11, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph.preheader, %.._crit_edge_crit_edge
  %12 = phi i64 [ %.pre, %.._crit_edge_crit_edge ], [ %9, %.lr.ph.preheader ], [ %22, %.lr.ph ]
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %12)
  ret i32 0

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %.lr.ph.preheader ]
  %14 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull @c, ptr noundef nonnull @y)
  %15 = load i64, ptr @c, align 8
  %16 = load i64, ptr @s, align 8
  %17 = load i64, ptr @tmp, align 8
  %18 = add nsw i64 %17, %16
  %spec.store.select = tail call i64 @llvm.smin.i64(i64 %18, i64 %15)
  store i64 %spec.store.select, ptr @tmp, align 8
  %19 = load i64, ptr @y, align 8, !tbaa !5
  %20 = mul nsw i64 %spec.store.select, %19
  %21 = load i64, ptr @ans, align 8, !tbaa !5
  %22 = add nsw i64 %20, %21
  store i64 %22, ptr @ans, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %23 = load i64, ptr @n, align 8, !tbaa !5
  %24 = icmp sgt i64 %23, %indvars.iv.next
  br i1 %24, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; 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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smin.i64(i64, i64) #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 = { 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10, !11}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.peeled.count", i32 1}


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