import sys
input = sys.stdin.readline
from collections import *

N, M = map(int, input().split())
H = list(map(int, input().split()))

G1 = [[] for _ in range(2*N)]
G2 = [[] for _ in range(2*N)]

for _ in range(M):
    u, v = map(int, input().split())
    u -= 1
    v -= 1
    
    if H[u]>H[v]:
        G1[2*u].append(2*v+1)
        G1[2*u+1].append(2*v+1)
    else:
        G1[2*u+1].append(2*v)

    if H[u]>H[v]:
        G2[2*v+1].append(2*u)
    else:
        G2[2*v].append(2*u+1)
        G2[2*v+1].append(2*u+1)

dp1 = [-10**18]*(2*N)
dp1[0] = 0
dp1[1] = 0

for v in range(2*N):
    for nv in G1[v]:
        dp1[nv] = max(dp1[nv], dp1[v]+max(0, H[nv//2]-H[v//2]))

dp2 = [-10**18]*(2*N)
dp2[2*N-2] = 0
dp2[2*N-1] = 0

for v in range(2*N-1, -1, -1):
    for nv in G2[v]:
        dp2[nv] = max(dp2[nv], dp2[v]+max(0, H[nv//2]-H[v//2]))

ans1 = max(dp1[-1], dp1[-2])
ans2 = max(dp2[0], dp2[1])

if ans1<0:
    print(-1)
else:
    print(ans1)

if ans2<0:
    print(-1)
else:
    print(ans2)