import sys

# sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()
dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
inf = (1 << 63)-1
# inf = (1 << 31)-1
md = 10**9+7
# md = 998244353


k = II()
dl = LLI(k)

inv = 4
ten = [1, 3, 2, 6, 4, 5]
cnt = [0]*7
cnt[0] = 1
ans = 0
for i, (d, l) in enumerate(dl):
    l %= 6
    cur = (ten[l]-1)*inv*d%7
    nc = [0]*7
    for s in range(7):
        ns = (s*ten[l]+cur)%7
        ans += ns*cnt[s]%md
        ans %= md
        nc[ns] += cnt[s]
    for s in range(7): cnt[s] += nc[s]

print(ans)