MOD=998244353
def matrix_mul(a,b,MOD=None):
    ret=[[0]*len(b[0]) for i in range(len(a))]
    for i in range(len(a)):
        for j in range(len(b[0])):
            for k in range(len(b)):
                ret[i][j]+=a[i][k]*b[k][j]
            if MOD:
                ret[i][j]%=MOD
    return ret

def matrix_pow(x,p,MOD=None):
    if p==0:
        for i in range(len(x)):
            for j in range(len(x)):
                if i==j:
                    x[i][j]=1
                else:
                    x[i][j]=0
        return x
    if p==1:
        return x
    if p%2==1:
        return matrix_mul(matrix_pow(x,p-1,MOD),x,MOD)
    half=matrix_pow(x,p//2,MOD)
    return matrix_mul(half,half,MOD)

def rep(x):
    return (giant_r[x//backet]*baby[x%backet]+baby_r[x%backet])%(MOD*15)

def power(x):
    return (giant[x//backet]*baby[x%backet])%(MOD*15)

backet=1000000
baby=[1]*(backet+1)
for i in range(backet):
	baby[i+1]=(baby[i]*10)%(MOD*15)
giant=[1]*(backet+1)
for i in range(backet):
	giant[i+1]=(giant[i]*baby[-1])%(MOD*15)
baby_r=[0]*(backet+1)
for i in range(backet):
	baby_r[i+1]=(baby_r[i]*10+1)%(MOD*15)
giant_r=[0]*(backet+1)
for i in range(backet):
	giant_r[i+1]=(giant_r[i]*baby[-1]+baby_r[-1])%(MOD*15)
M=int(input())
num=[tuple(map(int,input().split())) for i in range(M)]
S=0
N=0
for v,l in num:
    S+=l
    N*=power(l)
    N+=rep(l)*v
    N%=MOD*15
if S<=1:
    ans=0
    for i in range(1,N+1):
        if i%15==0:
            ans+=8
        elif i%5==0:
            ans+=4
        elif i%3==0:
            ans+=4
        else:
            ans+=len(str(i))
    print(ans)
    exit()
bet=matrix_pow([[10,10,0],[0,10,0],[1,4,1]],S-2,MOD)[-1]
bet[0]*=96
bet[1]*=48
bet[2]*=0
fb=[8,S,S,4,S,4,4,S,S,4,4,S,4,S,S]
sz=(N+1-pow(10,S-1,MOD*15))%(MOD*15)
ans=sum(bet)+(8*S+32)*(sz//15)+21
for i in range(sz%15):
    ans+=fb[(i+10)%15]
print(ans%MOD)