oj.uz

Submission #614233

# Submission time Handle Problem Language Result Execution time Memory
614233 2022-07-30T22:47:30 Z Plurm Stranded Far From Home (BOI22_island) C++11
10 / 100
 867 ms 20376 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;

int s[200005];
vector<int> g[200005];
int n, m;
bool check(int u) {
  priority_queue<pair<int, int>> pq;
  long long allies = s[u];
  gp_hash_table<int, null_type> alliance;
  alliance.insert(u);
  for (int v : g[u])
    pq.push({-s[v], v});
  while (!pq.empty()) {
    int vnxt = pq.top().second;
    pq.pop();
    if (alliance.find(vnxt) != alliance.end())
      continue;
    if (s[vnxt] <= allies) {
      allies += 1ll * s[vnxt];
      alliance.insert(vnxt);
      for (int v : g[vnxt]) {
        if (alliance.find(v) == alliance.end()) {
          pq.push({-s[v], v});
        }
      }
    } else {
      return false;
    }
  }
  return true;
}
int main() {
  scanf("%d%d", &n, &m);
  for (int i = 1; i <= n; i++) {
    scanf("%d", s + i);
  }
  for (int i = 0; i < m; i++) {
    int u, v;
    scanf("%d%d", &u, &v);
    g[u].push_back(v);
    g[v].push_back(u);
  }
  if (n > 2000) {
    int lo = 1;
    int hi = n;
    int mid;
    while (lo < hi) {
      mid = (lo + hi) / 2;
      if (check(mid)) {
        lo = mid + 1;
      } else {
        hi = mid;
      }
    }
    if (check(lo)) {
      for (int i = 1; i <= n; i++)
        printf("1");
      printf("\n");
    } else {
      for (int i = 1; i <= lo; i++)
        printf("1");
      for (int i = lo + 1; i <= n; i++)
        printf("0");
      printf("\n");
    }
  } else {
    for (int i = 1; i <= n; i++) {
      if (check(i))
        printf("1");
      else
        printf("0");
    }
    printf("\n");
  }
  return 0;
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |   scanf("%d%d", &n, &m);
      |   ~~~~~^~~~~~~~~~~~~~~~
island.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     scanf("%d", s + i);
      |     ~~~~~^~~~~~~~~~~~~
island.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     scanf("%d%d", &u, &v);
      |     ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 260 ms 5104 KB Output is correct
5 Correct 213 ms 5120 KB Output is correct
6 Correct 382 ms 5108 KB Output is correct
7 Correct 268 ms 5104 KB Output is correct
8 Correct 199 ms 5076 KB Output is correct
9 Correct 275 ms 5124 KB Output is correct
10 Correct 99 ms 5196 KB Output is correct
11 Correct 94 ms 5128 KB Output is correct
12 Correct 151 ms 5076 KB Output is correct
13 Correct 162 ms 5076 KB Output is correct
14 Correct 152 ms 5120 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Incorrect 456 ms 20256 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Incorrect 302 ms 20356 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4948 KB Output is correct
2 Incorrect 867 ms 20376 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 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 260 ms 5104 KB Output is correct
5 Correct 213 ms 5120 KB Output is correct
6 Correct 382 ms 5108 KB Output is correct
7 Correct 268 ms 5104 KB Output is correct
8 Correct 199 ms 5076 KB Output is correct
9 Correct 275 ms 5124 KB Output is correct
10 Correct 99 ms 5196 KB Output is correct
11 Correct 94 ms 5128 KB Output is correct
12 Correct 151 ms 5076 KB Output is correct
13 Correct 162 ms 5076 KB Output is correct
14 Correct 152 ms 5120 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Incorrect 456 ms 20256 KB Output isn't correct
18 Halted 0 ms 0 KB -