from collections import deque
N,M = map(int,input().split())
H = [0]+list(map(int,input().split()))
G0 = {i:[] for i in range(1,N+1)}
Indeg0 = [0]*(N+1)
G1 = {i:[] for i in range(1,N+1)}
Indeg1 = [0]*(N+1)
for _ in range(M):
    a,b = map(int,input().split())
    if b>a:
        G0[a].append((b,max(H[b]-H[a],0)))
        Indeg0[b] += 1
        G1[b].append((a,max(H[a]-H[b],0)))
        Indeg1[a] += 1
    else:
        G0[b].append((a,max(H[a]-H[b],0)))
        Indeg0[a] += 1
        G1[a].append((b,max(H[b]-H[a],0)))
        Indeg1[b] += 1
INFTY = 10**15
dist0 = [[-INFTY,-INFTY] for _ in range(N+1)]
que0 = deque([1])
dist0[1] = [0,0]
for i in range(2,N+1):
    if Indeg0[i]==0:
        for j,_ in G0[i]:
            Indeg0[j] -= 1
while que0:
    u = que0.popleft()
    d0,d1 = dist0[u]
    for v,d in G0[u]:
        if d>0:
            dist0[v][1] = max(dist0[v][1],d0+d)
        else:
            dist0[v][0] = max(dist0[v][0],d0,d1)
        Indeg0[v] -= 1
        if Indeg0[v]==0:
            que0.append(v)
dist1 = [[-INFTY,-INFTY] for _ in range(N+1)]
que1 = deque([N])
dist1[N] = [0,0]
for i in range(1,N):
    if Indeg1[i]==0:
        for j,_ in G1[i]:
            Indeg1[j] -= 1
while que1:
    u = que1.popleft()
    d0,d1 = dist1[u]
    for v,d in G1[u]:
        if d>0:
            dist1[v][1] = max(dist1[v][1],d0+d)
        else:
            dist1[v][0] = max(dist1[v][0],d0,d1)
        Indeg1[v] -= 1
        if Indeg1[v]==0:
            que1.append(v)
print(max(max(dist0[N]),-1))
print(max(max(dist1[1]),-1))