제출 #575076

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
575076		Sam_a17	Stranded Far From Home (BOI22_island)	C++14	0 / 100	1068 ms	524288 KiB

island

#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include "temp.cpp"
#include <cstdio>
using namespace std;

#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif

#define sz(x) (int((x).size()))
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define uniq(x) x.resize(unique(all(x)) - x.begin());
#define blt __builtin_popcount

#define pb push_back
#define popf pop_front
#define popb pop_back

void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(long double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}

template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(T v[],V n) {cerr << "["; for(int i = 0; i < n; i++) {print(v[i]); cerr << " "; } cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(deque<T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'

// for grid problems
int dx[8] = {-1,0,1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};

// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
  fastIO();

  if (str != "") {
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
  }
}
// Indexed Set
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int N = 3e5 + 10;
int n, m, p[N], sz[N], answ[N];
long long value[N];
set<pair<long long, int>> st;
vector<int> adj[N], comp[N];

int find(int a) {
  if(a != p[a]) {
    p[a] = find(p[a]);
  }
  return p[a];
}

int merge(int a, int b) {
  a = find(a), b = find(b);
  if(a == b) {
    return false;
  }
  if(sz[a] > sz[b]) {
    swap(a, b);
  }

  auto it = st.find({value[b], b});
  if(it != st.end()) {
    st.erase(it);
  }

  it = st.find({value[a], a});
  if(it != st.end()) {
    st.erase(it);
  }

  p[b] = a, sz[a] += sz[b];
  value[a] += value[b];

  st.insert({value[a], a});

  for(auto i: comp[b]) {
    comp[a].push_back(i);
  } comp[b].clear();
  return true;
}

void solve_() {
  cin >> n >> m;

  vector<pair<long long, int>> A(n + 1);
  vector<long long> B(n + 1);
  for(int i = 1; i <= n; i++) {
    cin >> A[i].first;
    A[i].second = i;
    B[i] = A[i].first;

    p[i] = i, sz[i] = 1;
    value[i] = A[i].first;
    comp[i].push_back(i);
    st.insert({value[i], i});
    answ[i] = 1;
  }

  for(int i = 1; i <= m; i++) {
    int a, b; cin >> a >> b;
    adj[a].push_back(b);
    adj[b].push_back(a);
  }

  sort(all(A));

  for(int i = 1; i <= n; i++) {
    long long curr = A[i].first;
    int j = i;
    while(j <= n && A[j].first == A[i].first) {
      for(auto k: adj[A[j].second]) {
        if(B[k] <= curr) {
          merge(k, A[j].second);
        }
      }
      j++;
    }

    if(j >= n) {
      break;
    }

    while(j <= n && sz(st) && st.begin()->first < A[j].first) {
      int c = find(st.begin()->second);
      for(auto k: comp[c]) {
        answ[k] = 0;
      }
      comp[c].clear(), sz[c] = 0;
      st.erase(st.begin());
    }

    i = j - 1;
  }

  for(int i = 1; i <= n; i++) {
    printf("%d", answ[i]);
  } printf("\n");
}

int main() {
  setIO("");

  auto solve = [&](int test_case)-> void {
    while(test_case--) {
      solve_();
    }
  };

  int test_cases = 1;
  solve(test_cases);

  return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

island.cpp: In function 'void setIO(std::string)':
island.cpp:64:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
island.cpp:65:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 35