oj.uz

Submission #963378

# Submission time Handle Problem Language Result Execution time Memory
963378 2024-04-14T22:28:24 Z Spade1 Stranded Far From Home (BOI22_island) C++14
10 / 100
 189 ms 46036 KB 
#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;
typedef tuple<ll, ll, ll> t3;
typedef tuple<int, int, int, int> t4;

template<typename T> using pq = priority_queue<T>;
template<typename T> using pqg = priority_queue<T, vector<T>, greater<T>>;

#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;

ll s[MX], ans[MX], sz[MX], rep[MX];
vi adj[MX], adj2[MX];
vector<t3> edges;

int f(int i) {return rep[i] == i ? i : rep[i] = f(rep[i]);}

void mark(int i, int prt, int v) {
  ans[i] = v;
  for (auto j : adj2[i]) {
    if (j == prt) continue;
    if (ans[j] == 0) mark(j, i, 0);
    else mark(j, i, v);
  }
}

void solve() {
  int n, m; cin >> n >> m;
  int mx = 0;
  for (int i = 1; i <= n; ++i) ans[i] = 1, rep[i] = i;
  for (int i = 1; i <= n; ++i) {
    cin >> s[i]; sz[i] = s[i];
    if (s[mx] < s[i]) mx = i;
  }
  for (int i = 1; i <= m; ++i) {
    int u, v; cin >> u >> v;
    adj[u].pb(v); adj[v].pb(u);
    edges.pb({max(s[u], s[v]), u, v});
  }
  sort(all(edges));
  for (auto [M, u, v] : edges) {
    int fu = f(u), fv = f(v);
    if (fu == fv) continue;
    adj2[u].pb(v); adj2[v].pb(u);
    if (s[u] > sz[fv]) ans[v] = 0;
    if (s[v] > sz[fu]) ans[u] = 0;
    sz[fu] += sz[fv];
    rep[fv] = rep[fu];
  }
  mark(mx, 0, 1);
  for (int i = 1; i <= n; ++i) 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: In function 'void solve()':
island.cpp:75:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   75 |   for (auto [M, u, v] : edges) {
      |             ^
island.cpp: At global scope:
island.cpp:89:8: warning: first argument of 'int main(ll, char**)' should be 'int' [-Wmain]
   89 | signed main(int argc, char* argv[]) {
      |        ^~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14936 KB Output is correct
2 Correct 4 ms 14940 KB Output is correct
3 Correct 4 ms 14940 KB Output is correct
4 Incorrect 5 ms 15160 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14936 KB Output is correct
2 Correct 6 ms 14940 KB Output is correct
3 Correct 137 ms 38408 KB Output is correct
4 Correct 134 ms 39716 KB Output is correct
5 Correct 159 ms 32984 KB Output is correct
6 Correct 189 ms 33676 KB Output is correct
7 Correct 177 ms 33708 KB Output is correct
8 Correct 152 ms 35164 KB Output is correct
9 Correct 139 ms 33392 KB Output is correct
10 Correct 103 ms 35040 KB Output is correct
11 Correct 99 ms 35828 KB Output is correct
12 Correct 145 ms 34108 KB Output is correct
13 Correct 141 ms 46036 KB Output is correct
14 Correct 131 ms 45920 KB Output is correct
15 Correct 127 ms 46024 KB Output is correct
16 Correct 104 ms 45548 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14936 KB Output is correct
2 Incorrect 172 ms 40696 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14936 KB Output is correct
2 Incorrect 174 ms 34180 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14936 KB Output is correct
2 Correct 4 ms 14940 KB Output is correct
3 Correct 4 ms 14940 KB Output is correct
4 Incorrect 5 ms 15160 KB Output isn't correct
5 Halted 0 ms 0 KB -