Submission #696866

#TimeUsernameProblemLanguageResultExecution timeMemory
696866Tien_NoobStranded Far From Home (BOI22_island)C++17
100 / 100
215 ms35460 KiB
//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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