#import <stdio.h>
#define MAX(a,b) ((a)<(b)?(b):(a))
long CEIL(long x, long y){
    if(x%y==0) {
        return x/y;
    }else{
        return x/y+1;
    }
}
int main(){
    int n;
    scanf("%d",&n);
    long a=1,b=1;
    for(int i=0;i<n;i++){
        long c,d;
        scanf("%ld %ld",&c,&d);
        long k = MAX(CEIL(a,c),CEIL(b,d));
        a=c*k;
        b=d*k;
    }
    printf("%ld",a+b);
}

; ModuleID = '/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_894/source.m'
source_filename = "/data/TheStack_IR/OJ_Samples/Collated/ObjectiveC/Source_894/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
@.str.1 = private unnamed_addr constant [8 x i8] c"%ld %ld\00", align 1
@.str.2 = private unnamed_addr constant [4 x i8] c"%ld\00", align 1

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local i64 @CEIL(i64 noundef %x, i64 noundef %y) local_unnamed_addr #0 {
entry:
  %rem = srem i64 %x, %y
  %cmp = icmp ne i64 %rem, 0
  %div = sdiv i64 %x, %y
  %add = zext i1 %cmp to i64
  %retval.0 = add nsw i64 %div, %add
  ret i64 %retval.0
}

; Function Attrs: nofree nounwind uwtable
define dso_local i32 @main() local_unnamed_addr #1 {
entry:
  %n = alloca i32, align 4
  %c = alloca i64, align 8
  %d = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %n) #5
  %call = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %n)
  %0 = load i32, ptr %n, align 4, !tbaa !5
  %cmp30 = icmp sgt i32 %0, 0
  br i1 %cmp30, label %for.body, label %for.cond.cleanup

for.cond.cleanup.loopexit:                        ; preds = %for.body
  %1 = add nsw i64 %mul, %mul7
  br label %for.cond.cleanup

for.cond.cleanup:                                 ; preds = %for.cond.cleanup.loopexit, %entry
  %add = phi i64 [ 2, %entry ], [ %1, %for.cond.cleanup.loopexit ]
  %call8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %add)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %n) #5
  ret i32 0

for.body:                                         ; preds = %entry, %for.body
  %a.033 = phi i64 [ %mul, %for.body ], [ 1, %entry ]
  %i.032 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
  %b.031 = phi i64 [ %mul7, %for.body ], [ 1, %entry ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %c) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %d) #5
  %call1 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %c, ptr noundef nonnull %d)
  %2 = load i64, ptr %c, align 8, !tbaa !9
  %rem.i = srem i64 %a.033, %2
  %cmp.i = icmp ne i64 %rem.i, 0
  %div.i = sdiv i64 %a.033, %2
  %add.i = zext i1 %cmp.i to i64
  %retval.0.i = add nsw i64 %div.i, %add.i
  %3 = load i64, ptr %d, align 8, !tbaa !9
  %rem.i15 = srem i64 %b.031, %3
  %cmp.i16 = icmp ne i64 %rem.i15, 0
  %div.i17 = sdiv i64 %b.031, %3
  %add.i18 = zext i1 %cmp.i16 to i64
  %retval.0.i19 = add nsw i64 %div.i17, %add.i18
  %spec.select = call i64 @llvm.smax.i64(i64 %retval.0.i, i64 %retval.0.i19)
  %mul = mul nsw i64 %spec.select, %2
  %mul7 = mul nsw i64 %spec.select, %3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %d) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %c) #5
  %inc = add nuw nsw i32 %i.032, 1
  %4 = load i32, ptr %n, align 4, !tbaa !5
  %cmp = icmp slt i32 %inc, %4
  br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit
}

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

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #4

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { nounwind }

!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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
