#include <bits/stdc++.h>
#define ll long long
#define mod 998244353
#define fastio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define rep(i,s) for(ll i=0; i<s ; i++)
#define f(i,a,b) for(ll i(a); i<b ; i++)
const ll INF = 1000000000000000000;
const ll N = 100001;
const ll MOD = 1000000007;
const ll modi = 1000000007;
const ll MAXN = 10000000000;
const ll rootval = 319;
using namespace std;
ll upedge[N];
ll ngood[N];
vector<ll> adj[N];
ll arr[N];
ll par[N];
ll n;
void dfs1(ll v, ll p){
ll sum = 0;
for(auto u : adj[v]){
if(u == p){
continue;
}
else{
if(upedge[u] == -1){
dfs1(u,v);
}
sum += upedge[u];
}
}
upedge[v] = arr[v] - sum;
}
void dfs2(ll v, ll p){
ll sum = 0;
for(auto u : adj[v]){
if(u == p || ngood[u] == -1){
continue;
}
else{
if(upedge[u] == -1){
dfs2(u,v);
}
sum += upedge[u];
}
}
upedge[v] = arr[v] - sum;
}
void parents(ll v, ll p){
for(auto u : adj[v]){
if(u == p){
continue;
}
else{
par[u] = v;
parents(u,v);
}
}
}
void parents2(ll v, ll p){
for(auto u : adj[v]){
if(u == p || ngood[u] == -1){
continue;
}
else{
par[u] = v;
parents2(u,v);
}
}
}
vector<bool> visited;
vector<ll> parent;
ll cycle_start, cycle_end;
bool dfs(ll v, ll par) { // passing vertex and its parent vertex
visited[v] = true;
for (ll u : adj[v]) {
if(u == par) continue; // skipping edge to parent vertex
if (visited[u]) {
cycle_end = v;
cycle_start = u;
return true;
}
parent[u] = v;
if (dfs(u, parent[u]))
return true;
}
return false;
}
vector<ll> find_cycle() {
visited.assign(n, false);
parent.assign(n, -1);
cycle_start = -1;
vector<ll> cycle;
for (ll v = 0; v < n; v++) {
if (!visited[v] && dfs(v, parent[v]))
break;
}
if (cycle_start == -1) {
return cycle;
} else {
vector<ll> cycle;
cycle.push_back(cycle_start);
for (ll v = cycle_end; v != cycle_start; v = parent[v]){
cycle.push_back(v);
}
reverse(cycle.begin(), cycle.end());
return cycle;
}
}
int main(){
fastio();
ll m;
cin >> n >> m;
vector<pair<ll,ll>> edges;
rep(i,n){
cin >> arr[i];
upedge[i] = -1;
}
rep(i,m){
ll u,v;
cin >> u >> v;
--u,--v;
adj[u].push_back(v);
adj[v].push_back(u);
edges.push_back(make_pair(u,v));
}
if(m == n-1){
ll root = 0;
rep(i,n){
if(adj[i].size() != 1){
root = i;
break;
}
}
rep(i,n){
if(adj[i].size() == 1){
upedge[i] = arr[i];
}
}
dfs1(root,-1);
parents(root,-1);
par[root] = -1;
map<pair<ll,ll>,ll> mp;
rep(i,n){
if(par[i] == -1){
continue;
}
else{
mp[{i,par[i]}] = upedge[i];
mp[{par[i],i}] = upedge[i];
}
}
rep(i,edges.size()){
ll u = edges[i].first;
ll v = edges[i].second;
cout << 2*mp[{u,v}] << endl;
}
}
else if(m == n){
// one cycle exists so just find that one cycle done?
rep(i,n){
if(adj[i].size() == 1){
upedge[i] = arr[i];
}
}
vector<ll> cycle = find_cycle();
rep(i,cycle.size()){
ngood[cycle[i]] = -1;
}
if(cycle.size() % 2 == 0){
assert(0 == 1);
cout << 0 << endl;
}
else{
rep(j,cycle.size()){
ll i = cycle[j];
dfs2(i,-1);
parents2(i,-1);
par[i] = -1;
}
map<pair<ll,ll>,ll> mp;
map<pair<ll,ll>,ll> mp2;
rep(i,n){
if(par[i] != -1){
mp[{par[i],i}] = upedge[i];
mp[{i,par[i]}] = upedge[i];
mp2[{par[i],i}] = 2*upedge[i];
mp2[{i,par[i]}] = 2*upedge[i];
}
}
rep(i,cycle.size()){
for(auto u : adj[cycle[i]]){
if(ngood[u] == -1){
continue;
}
else{
arr[cycle[i]] = arr[cycle[i]] - mp[{cycle[i],u}];
}
}
}
ll val = arr[cycle[0]];
f(i,1,cycle.size()){
if(i%2 == 1){
val += arr[cycle[i]];
}
else{
val = val - arr[cycle[i]];
}
}
mp2[{cycle[0],cycle[1]}] = val;
f(i,1,cycle.size()-1){
mp2[{cycle[i],cycle[i+1]}] = 2*arr[cycle[i]] - mp2[{cycle[i-1],cycle[i]}];
mp2[{cycle[i+1],cycle[i]}] = mp2[{cycle[i],cycle[i+1]}];
}
mp2[{cycle[cycle.size()-1],cycle[0]}] = 2*arr[cycle[cycle.size()-1]] - mp2[{cycle[cycle.size()-1],cycle[cycle.size()-2]}];
mp2[{cycle[0],cycle[cycle.size()-1]}] = mp2[{cycle[cycle.size()-1],cycle[0]}];
rep(i,edges.size()){
cout << mp2[{edges[i].first,edges[i].second}] << endl;
}
}
}
else if(m > n){
cout << 0 << endl;
}
}
