N=int(input())
u15=[0]*60
v15=[0]*60
v15[0]=10
mod=998244353
for j in range(1,60):
  x,y=(u15[j-1]**2)*15+2*v15[j-1]*u15[j-1],v15[j-1]**2
  if y>=15:
    x+=y//15
    y%=15
  x%=mod
  y%=mod
  u15[j],v15[j]=x,y
u5=[0]*60
v5=[0]*60
u5[0]=2
for j in range(1,60):
  x,y=(u5[j-1]**2)*5+2*v5[j-1]*u5[j-1],v5[j-1]**2
  if y>=5:
    x+=y//5
    y%=5
  x%=mod
  y%=mod
  u5[j],v5[j]=x,y
u0=[0]*60
v0=[0]*60
v0[0]=10
for j in range(1,60):
  v0[j]=v0[j-1]**2
  v0[j]%=mod
u3=[0]*60
v3=[0]*60
u3[0]=3
v3[0]=1
for j in range(1,60):
  x,y=(u3[j-1]**2)*3+2*v3[j-1]*u3[j-1],v3[j-1]**2
  if y>=3:
    x+=y//3
    y%=3
  x%=mod
  y%=mod
  u3[j],v3[j]=x,y
def g(l,c):
  x,y=0,1
  if c==15:
    for k in range(60):
      if (l>>k)&1:
        a,b=u15[k],v15[k]
        x2,y2=x*a*15+y*a+b*x,b*y
        x2%=mod
        y2%=mod
        if y2>=15:
          x2+=y2//15
          y2%=15
        x,y=x2,y2
  elif c==5:
    for k in range(60):
      if (l>>k)&1:
        a,b=u5[k],v5[k]
        x2,y2=x*a*5+y*a+b*x,b*y
        x2%=mod
        y2%=mod
        if y2>=5:
          x2+=y//5
          y2%=5
        x,y=x2,y2
  elif c==3:
    for k in range(60):
      if (l>>k)&1:
        a,b=u3[k],v3[k]
        x2,y2=x*a*3+y*a+b*x,b*y
        x2%=mod
        y2%=mod
        if y2>=3:
          x2+=y//3
          y2%=3
        x,y=x2,y2
  else:
    for k in range(60):
      if (l>>k)&1:
        y*=v0[k]
        y%=mod
  return x,y
def f(a,l,c):
  if l==1:
    return a//c,a%c
  if l&1:
    k1,k2=f(a,l-1,c)
    x,y=10*k1,10*k2+a
    if y>=c:
      x+=y//c
      y%=c
    x%=mod
    return x,y
  else:
    k1,k2=f(a,l//2,c)
    a1,a2=g(l//2,c)
    x,y=((k1*a1)%mod)*c+k2*a1+(a2+1)*k1,k2*(a2+1)
    if y>=c:
      x+=y//c
      y%=c
    return x,y
def h(n):
  if n==0:
    return 0
  ans=1-(n+1)*pow(10,n,mod)+n*pow(10,n+1,mod)
  ans%=mod
  ans*=pow(81,-1,mod)
  ans%=mod
  ans*=480
  ans%=mod
  w=10*(pow(10,n,mod)-1)
  w%=mod
  w*=pow(9,-1,mod)
  w%=mod
  w*=96
  result=ans+w
  result%=mod
  return result
count=0
ans=''
L=[]
for i in range(N):
  v,l=map(int,input().split())
  if count+l<=2:
    ans+=str(v)*l
  count+=l
  L.append((v,l))
def t(a,l,count,c):
  x1,y1=f(a,l,c)
  x2,y2=g(count,c)
  x,y=((x1*x2)%mod)*c+y1*x2+x1*y2,y1*y2
  if y>=c:
    x+=y//c
    y%=c
  return x,y
if count<=2:
  result=0
  x=int(ans)
  for y in range(1,x+1):
    if y%15==0:
      result+=8
    elif y%5==0:
      result+=4
    elif y%3==0:
      result+=4
    else:
      z=str(y)
      result+=len(z)
  print(result)
  exit()
a0,a1=0,0
b0,b1=0,0
c0,c1=0,0
d=0
count=0
for i in range(N-1,-1,-1):
  v,l=L[i][:]
  a2,a3=t(v,l,count,15)
  a0+=a2
  a1+=a3
  a0+=a1//15
  a1%=15
  b2,b3=t(v,l,count,5)
  b0+=b2
  b1+=b3
  b0+=b1//5
  b1%=5
  c2,c3=t(v,l,count,3)
  c0+=c2
  c1+=c3
  c0+=c1//3
  c1%=3
  d2,d3=t(v,l,count,mod)
  d+=d3
  d%=mod
  count+=l
u=10**9+7
result=a0*8+(b0-a0)*4+(c0-a0)*4
result%=mod
d-=a0+(b0-a0)+(c0-a0)
_,k=f(9,count-1,mod)
k1,_=f(9,count-1,15)
k2,_=f(9,count-1,5)
k3,_=f(9,count-1,3)
w=k-(k1+(k2-k1)+(k3-k1))
d-=w
result+=d*count
result+=h(count-3)
result%=mod
for x in range(1,100):
  if x%5!=0 and x%3!=0:
    y=str(x)
    result+=len(y)
    result%=mod
print(result)