#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef long long Int;

int main() {
    Int n;
    scanf("%lld", &n);
    Int p = 1;
    for (Int i = 1; i * i <= n; i++) {
        if (n % i == 0) {
            p = i;
        }
    }
    Int q = n / p;
    printf("%lld\n", p + q - 2);
}

; ModuleID = '/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_192/source.m'
source_filename = "/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_192/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 [5 x i8] c"%lld\00", align 1
@.str.1 = private unnamed_addr constant [6 x i8] c"%lld\0A\00", align 1

; Function Attrs: minsize nofree nounwind optsize uwtable
define dso_local i32 @main() local_unnamed_addr #0 {
entry:
  %n = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %n) #3
  %call = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %n) #4
  %0 = load i64, ptr %n, align 8, !tbaa !5
  br label %for.cond

for.cond:                                         ; preds = %for.body, %entry
  %i.0 = phi i64 [ 1, %entry ], [ %inc, %for.body ]
  %p.0 = phi i64 [ 1, %entry ], [ %spec.select, %for.body ]
  %mul = mul nsw i64 %i.0, %i.0
  %cmp.not = icmp sgt i64 %mul, %0
  br i1 %cmp.not, label %for.cond.cleanup, label %for.body

for.cond.cleanup:                                 ; preds = %for.cond
  %div = sdiv i64 %0, %p.0
  %add = add i64 %p.0, -2
  %sub = add i64 %add, %div
  %call2 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %sub) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %n) #3
  ret i32 0

for.body:                                         ; preds = %for.cond
  %rem = srem i64 %0, %i.0
  %cmp1 = icmp eq i64 %rem, 0
  %spec.select = select i1 %cmp1, i64 %i.0, i64 %p.0
  %inc = add nuw nsw i64 %i.0, 1
  br label %for.cond
}

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

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

attributes #0 = { minsize nofree nounwind optsize 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 = { minsize nofree nounwind optsize "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 }
attributes #4 = { minsize optsize }

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