#import <stdio.h>
#import <stdlib.h>

int compare_int(const void *a, const void *b) {
    return *(int*)a - *(int*)b;
}

int main(int argc, const char * argv[]) {
    int N;
    scanf("%d", &N);
    int *numbers = (int*)malloc(N * sizeof(int));
    
    int n;
    int i = 0;
    while (scanf("%d", &n) != EOF) {
        numbers[i] = n;
        i++;
    }
    
    qsort(numbers, N, sizeof(int), compare_int);
    
    printf("%d", numbers[N-1]-numbers[0]);
    
    free(numbers);
    return 0;
}

; ModuleID = '/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_765/source.m'
source_filename = "/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_765/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 [3 x i8] c"%d\00", align 1

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local i32 @compare_int(ptr nocapture noundef readonly %a, ptr nocapture noundef readonly %b) #0 {
entry:
  %0 = load i32, ptr %a, align 4, !tbaa !5
  %1 = load i32, ptr %b, align 4, !tbaa !5
  %sub = sub nsw i32 %0, %1
  ret i32 %sub
}

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %argc, ptr nocapture noundef readnone %argv) local_unnamed_addr #1 {
entry:
  %N = alloca i32, align 4
  %n = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %N) #7
  %call = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %N)
  %0 = load i32, ptr %N, align 4, !tbaa !5
  %conv = sext i32 %0 to i64
  %mul = shl nsw i64 %conv, 2
  %call1 = call noalias ptr @malloc(i64 noundef %mul) #8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %n) #7
  %call215 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %n)
  %cmp.not16 = icmp eq i32 %call215, -1
  br i1 %cmp.not16, label %while.end, label %while.body

while.body:                                       ; preds = %entry, %while.body
  %indvars.iv = phi i64 [ %indvars.iv.next, %while.body ], [ 0, %entry ]
  %1 = load i32, ptr %n, align 4, !tbaa !5
  %arrayidx = getelementptr inbounds i32, ptr %call1, i64 %indvars.iv
  store i32 %1, ptr %arrayidx, align 4, !tbaa !5
  %indvars.iv.next = add nuw i64 %indvars.iv, 1
  %call2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %n)
  %cmp.not = icmp eq i32 %call2, -1
  br i1 %cmp.not, label %while.end, label %while.body

while.end:                                        ; preds = %while.body, %entry
  %2 = load i32, ptr %N, align 4, !tbaa !5
  %conv4 = sext i32 %2 to i64
  call void @qsort(ptr noundef %call1, i64 noundef %conv4, i64 noundef 4, ptr noundef nonnull @compare_int) #7
  %3 = load i32, ptr %N, align 4, !tbaa !5
  %sub = add nsw i32 %3, -1
  %idxprom5 = sext i32 %sub to i64
  %arrayidx6 = getelementptr inbounds i32, ptr %call1, i64 %idxprom5
  %4 = load i32, ptr %arrayidx6, align 4, !tbaa !5
  %5 = load i32, ptr %call1, align 4, !tbaa !5
  %sub8 = sub nsw i32 %4, %5
  %call9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %sub8)
  call void @free(ptr noundef %call1) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %n) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %N) #7
  ret i32 0
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #4

; Function Attrs: nofree
declare void @qsort(ptr noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #5

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #6

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

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #4 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #5 = { nofree "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 #6 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #7 = { nounwind }
attributes #8 = { nounwind allocsize(0) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
