#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef tree<int,null_type,less<int>,rb_tree_tag,
tree_order_statistics_node_update> indexed_set;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<ld,ld> pld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pii> vpi;
typedef vector<pll> vpl;
#define pb push_back
#define popb pop_back
#define pp pop_back
#define pf push_front
#define popf pop_front
#define all(x) (x).begin(),(x).end()
#define ff first
#define ss second
///#define int ll
int nx[4] = {0,0,1,-1}, ny[4] = {1,-1,0,0};
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;}
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);}
const int nax = 2e5 + 4;
int p[nax];
string ans = "";
int n, m;
ll s[nax];
ll val[nax];
vi adj[nax];
vpl edges;
int findset(int x, ll v)
{
int head = p[x] == x? x: findset(p[x],v);
if(ans[head] == '0')
ans[x] = '0';
if(s[head] < v)
ans[x] = '0';
return p[x] = head;
}
void unite(int i, int j, ll v)
{
int x = findset(i,v);
int y = findset(j,v);
if(x == y)
return ;
if(s[x] > s[y])
swap(x,y);
p[x] = y;
s[y] += s[x];
}
bool comp(pll a, pll b)
{
ll u = max(s[a.ff],s[a.ss]);
ll v = max(s[b.ff],s[b.ss]);
return u < v;
}
void solve()
{
cin >> n >> m;
for(int i = 1; i <= n; i++)
{
cin >> s[i];
val[i] = s[i];
p[i] = i;
ans += '1';
}
for(int i = 1; i <= m; i ++)
{
int a, b;
cin >> a >> b;
adj[a].pb(b);
adj[b].pb(a);
edges.pb({a,b});
}
sort(all(edges),comp);
for(auto e: edges)
{
ll maxi = max(val[e.ff],val[e.ss]);
unite(e.ff,e.ss,maxi);
}
for(int i = 1; i <= n; i++)
{
int x = findset(i,0);
cout << ans[i];
}
}
int32_t main()
{
ios::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int tt = 1;
while(tt --)
solve();
}
Compilation message
island.cpp: In function 'void solve()':
island.cpp:99:21: warning: unused variable 'x' [-Wunused-variable]
99 | int x = findset(i,0);
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 3 |
Incorrect |
2 ms |
4948 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
4948 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
4948 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
4948 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 2 |
Correct |
2 ms |
4948 KB |
Output is correct |
| 3 |
Incorrect |
2 ms |
4948 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
