This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
using namespace std;
const int N = 2e5;
int lab[N + 1];
vector<int> f[N + 1], adj[N + 1];
long long sum[N + 1];
int n, m, id[N + 1], s[N + 1];
bool res[N + 1];
int FindSet(int u)
{
return lab[u] < 0 ? u : lab[u] = FindSet(lab[u]);
}
void unite(int u, int v)
{
u = FindSet(u);
v = FindSet(v);
if (u == v)
{
return ;
}
if (lab[u] > lab[v])
{
swap(u, v);
}
lab[u] += lab[v];
sum[u] += sum[v];
lab[v] = u;
move(f[v].begin(), f[v].end(), back_inserter(f[u]));
}
void read()
{
cin >> n >> m;
for (int i = 1; i <= n; ++ i)
{
cin >> s[i];
sum[i] = s[i];
lab[i] = -1;
f[i] = {i};
id[i] = i;
}
while(m--)
{
int u, v;
cin >> u >> v;
adj[u].push_back(v);
adj[v].push_back(u);
}
}
void solve()
{
sort(id + 1, id + n + 1, [&](const int x, const int &y)
{
return s[x] < s[y];
});
for (int i = 1; i <= n; ++ i)
{
int u = id[i];
for (int v : adj[u])
{
if (s[v] <= s[u])
{
if (sum[FindSet(v)] < s[u])
{
f[FindSet(v)].clear();
}
unite(u, v);
}
}
}
int root = FindSet(id[n]);
for (int u : f[root])
{
res[u] = true;
}
for (int u = 1; u <= n; ++ u)
{
cout << res[u];
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
if (fopen(TASK".INP", "r"))
{
freopen(TASK".INP", "r", stdin);
//freopen(TASK".OUT", "w", stdout);
}
int t = 1;
bool typetest = false;
if (typetest)
{
cin >> t;
}
for (int __ = 1; __ <= t; ++ __)
{
//cout << "Case " << __ << ": ";
read();
solve();
}
}
Compilation message (stderr)
island.cpp: In function 'int main()':
island.cpp:89:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
89 | freopen(TASK".INP", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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