#pragma once
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double db;
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<ld> vld;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
typedef vector<pld> vpld;
typedef vector<vi> vvi;
template<typename T> using pq = priority_queue<T>;
template<typename T> using pqg = priority_queue<T, vector<T>, greater<T>>;
#define rep0(a) for (int i = 0; i < a; ++i)
#define rep1(i, a) for (int i = 0; i < a; ++i)
#define rep2(i, a, b) for (int i = a; i <= b; ++i)
#define rep3(i, a, b, c) for (int i = a; i <= b; i+=c)
#define overload4(a, b, c, d, e, ...) e
#define rep(...) overload4(__VA_ARGS__, rep3, rep2, rep1, rep0)(__VA_ARGS__)
#define repd0(a) for (int i = a; i >= 1; --i)
#define repd1(i, a) for (int i = a; i >= 1; --i)
#define repd2(i, a, b) for (int i = b; i >= a; --i)
#define repd3(i, a, b, c) for (int i = b; i >= a; i-=c)
#define repd(...) overload4(__VA_ARGS__, repd3, repd2, repd1, repd0)(__VA_ARGS__)
#define trav(a, x) for (auto& a : x)
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define st first
#define nd second
#define lb lower_bound
#define ub upper_bound
#define all(x) (x).begin(), (x).end()
#define ins insert
#define int ll
template<typename T> bool ckmin(T &a, const T &b) { return b < a ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9 + 7;
const int INF = 0x3fffffff;
const ll LINF = 0x1fffffffffffffff;
const char nl = '\n';
const int MX = 2e5 + 3;
int ans[MX], s[MX], prt[MX], S[MX], order[MX];
pll sorted[MX];
vi adj[MX], to_update[MX];
set<pll> to_explore[MX];
int f(int i) {return prt[i] == i ? i : prt[i] = f(prt[i]);}
void update(int i) {
for (auto j : to_update[i]) {
if (ans[j] == 0) continue;
ans[j] = 0; update(j);
}
}
void solve() {
int n, m; cin >> n >> m;
rep(i, 1, n) {
cin >> s[i];
S[i] = s[i];
prt[i] = i;
ans[i] = 1;
sorted[i] = {s[i], i};
}
rep(i, 1, m) {
int u, v; cin >> u >> v;
adj[u].pb(v); adj[v].pb(u);
}
sort(sorted+1, sorted+n+1);
rep(i, 1, n) order[sorted[i].nd] = i;
rep(i, 1, n) {
int a = sorted[i].nd;
for (auto b : adj[a]) {
int fa = f(a), fb = f(b);
if (order[b] < order[a] && fa != fb) {
S[fa] += S[fb];
prt[fb] = prt[fa];
if (to_explore[a].size() < to_explore[b].size()) swap(to_explore[a], to_explore[b]);
for (auto c : to_explore[b]) to_explore[a].ins(c);
}
}
int current_sum = S[f(a)];
while (!to_explore[a].empty() && current_sum >= (*to_explore[a].begin()).st) {
auto B = (*to_explore[a].begin()); to_explore[a].erase(B);
int b = B.nd;
int fa = f(a), fb = f(b);
if (order[b] < order[a] && fa != fb) {
S[fa] += S[fb];
prt[fb] = prt[fa];
if (to_explore[a].size() < to_explore[b].size()) swap(to_explore[a], to_explore[b]);
for (auto c : to_explore[b]) to_explore[a].ins(c);
}
current_sum = S[f(a)];
}
int cnt = 0;
for (auto b : adj[a]) if (S[b] <= current_sum) cnt++;
for (auto b : adj[a]) {
if (order[b] < order[a]) continue;
if (s[b] <= current_sum) to_update[b].pb(a);
to_explore[a].ins({S[b], b});
}
if (!cnt && order[a] != n) ans[a] = 0, update(a);
}
rep(i, 1, n) cout << ans[i];
cout << nl;
}
signed main(int argc, char* argv[]) {
ios_base::sync_with_stdio(0); cin.tie(NULL);
int t = 1;
// cin >> t;
while (t--) { solve(); }
return 0;
}
Compilation message
island.cpp:1:9: warning: #pragma once in main file
1 | #pragma once
| ^~~~
island.cpp:123:8: warning: first argument of 'int main(ll, char**)' should be 'int' [-Wmain]
123 | signed main(int argc, char* argv[]) {
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
29272 KB |
Output is correct |
| 2 |
Correct |
6 ms |
29276 KB |
Output is correct |
| 3 |
Correct |
7 ms |
29308 KB |
Output is correct |
| 4 |
Incorrect |
7 ms |
29276 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
29276 KB |
Output is correct |
| 2 |
Correct |
6 ms |
29276 KB |
Output is correct |
| 3 |
Incorrect |
124 ms |
43856 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
29276 KB |
Output is correct |
| 2 |
Incorrect |
197 ms |
43568 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
29276 KB |
Output is correct |
| 2 |
Incorrect |
216 ms |
43432 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
29272 KB |
Output is correct |
| 2 |
Correct |
6 ms |
29276 KB |
Output is correct |
| 3 |
Correct |
7 ms |
29308 KB |
Output is correct |
| 4 |
Incorrect |
7 ms |
29276 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
