oj.uz

Submission #575178

# Submission time Handle Problem Language Result Execution time Memory
575178 2022-06-09T20:36:56 Z Sam_a17 Stranded Far From Home (BOI22_island) C++17
100 / 100
 657 ms 64564 KB 
#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 = 4e5 + 10;
long long n, m, p[N], sz[N], answ[N];
long long value[N];
set<pair<long long, int>> st;
vector<long long> adj[N], comp[N];

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

long long merge(long long a, long long b) {
  a = find(a), b = find(b);
  if(a == b) {
    return false;
  }
  if(sz(comp[a]) < sz(comp[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);
  }
  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++) {
    int j = i;
    while(j <= n && A[j].first == A[i].first) {
      for(auto k: adj[A[j].second]) {
        if(B[k] <= A[j].first) {
          merge(k, A[j].second);
        }
      }
      j++;
    }

    if(j > n) {
      break;
    }

    while(!st.empty() && st.begin()->first < A[j].first) {
      long long c = find(st.begin()->second);
      st.erase(st.begin());

      for(auto k: comp[c]) {
        answ[k] = 0;
      }
      comp[c].clear();
    }

    i = j - 1;
  }

  for(int i = 1; i <= n; i++) {
    printf("%lld", 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;
}

Compilation message

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
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19028 KB Output is correct
3 Correct 10 ms 19116 KB Output is correct
4 Correct 13 ms 19412 KB Output is correct
5 Correct 12 ms 19508 KB Output is correct
6 Correct 13 ms 19400 KB Output is correct
7 Correct 12 ms 19376 KB Output is correct
8 Correct 13 ms 19412 KB Output is correct
9 Correct 12 ms 19540 KB Output is correct
10 Correct 12 ms 19468 KB Output is correct
11 Correct 13 ms 19540 KB Output is correct
12 Correct 15 ms 19520 KB Output is correct
13 Correct 11 ms 19412 KB Output is correct
14 Correct 15 ms 19496 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19048 KB Output is correct
3 Correct 321 ms 58328 KB Output is correct
4 Correct 297 ms 58344 KB Output is correct
5 Correct 420 ms 59688 KB Output is correct
6 Correct 425 ms 61036 KB Output is correct
7 Correct 447 ms 61172 KB Output is correct
8 Correct 384 ms 58508 KB Output is correct
9 Correct 273 ms 64432 KB Output is correct
10 Correct 249 ms 56952 KB Output is correct
11 Correct 406 ms 59788 KB Output is correct
12 Correct 508 ms 58148 KB Output is correct
13 Correct 280 ms 57420 KB Output is correct
14 Correct 285 ms 57324 KB Output is correct
15 Correct 247 ms 57240 KB Output is correct
16 Correct 208 ms 56892 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 19028 KB Output is correct
2 Correct 628 ms 61136 KB Output is correct
3 Correct 657 ms 61536 KB Output is correct
4 Correct 318 ms 57300 KB Output is correct
5 Correct 276 ms 57364 KB Output is correct
6 Correct 655 ms 61368 KB Output is correct
7 Correct 278 ms 57328 KB Output is correct
8 Correct 279 ms 57328 KB Output is correct
9 Correct 203 ms 56844 KB Output is correct
10 Correct 292 ms 56276 KB Output is correct
11 Correct 359 ms 56612 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 19028 KB Output is correct
2 Correct 546 ms 58572 KB Output is correct
3 Correct 587 ms 59400 KB Output is correct
4 Correct 571 ms 61400 KB Output is correct
5 Correct 567 ms 62768 KB Output is correct
6 Correct 544 ms 58544 KB Output is correct
7 Correct 312 ms 59784 KB Output is correct
8 Correct 232 ms 58988 KB Output is correct
9 Correct 218 ms 41232 KB Output is correct
10 Correct 600 ms 64564 KB Output is correct
11 Correct 365 ms 56592 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 10 ms 19028 KB Output is correct
3 Correct 10 ms 19116 KB Output is correct
4 Correct 13 ms 19412 KB Output is correct
5 Correct 12 ms 19508 KB Output is correct
6 Correct 13 ms 19400 KB Output is correct
7 Correct 12 ms 19376 KB Output is correct
8 Correct 13 ms 19412 KB Output is correct
9 Correct 12 ms 19540 KB Output is correct
10 Correct 12 ms 19468 KB Output is correct
11 Correct 13 ms 19540 KB Output is correct
12 Correct 15 ms 19520 KB Output is correct
13 Correct 11 ms 19412 KB Output is correct
14 Correct 15 ms 19496 KB Output is correct
15 Correct 10 ms 19028 KB Output is correct
16 Correct 10 ms 19048 KB Output is correct
17 Correct 321 ms 58328 KB Output is correct
18 Correct 297 ms 58344 KB Output is correct
19 Correct 420 ms 59688 KB Output is correct
20 Correct 425 ms 61036 KB Output is correct
21 Correct 447 ms 61172 KB Output is correct
22 Correct 384 ms 58508 KB Output is correct
23 Correct 273 ms 64432 KB Output is correct
24 Correct 249 ms 56952 KB Output is correct
25 Correct 406 ms 59788 KB Output is correct
26 Correct 508 ms 58148 KB Output is correct
27 Correct 280 ms 57420 KB Output is correct
28 Correct 285 ms 57324 KB Output is correct
29 Correct 247 ms 57240 KB Output is correct
30 Correct 208 ms 56892 KB Output is correct
31 Correct 11 ms 19028 KB Output is correct
32 Correct 628 ms 61136 KB Output is correct
33 Correct 657 ms 61536 KB Output is correct
34 Correct 318 ms 57300 KB Output is correct
35 Correct 276 ms 57364 KB Output is correct
36 Correct 655 ms 61368 KB Output is correct
37 Correct 278 ms 57328 KB Output is correct
38 Correct 279 ms 57328 KB Output is correct
39 Correct 203 ms 56844 KB Output is correct
40 Correct 292 ms 56276 KB Output is correct
41 Correct 359 ms 56612 KB Output is correct
42 Correct 12 ms 19028 KB Output is correct
43 Correct 546 ms 58572 KB Output is correct
44 Correct 587 ms 59400 KB Output is correct
45 Correct 571 ms 61400 KB Output is correct
46 Correct 567 ms 62768 KB Output is correct
47 Correct 544 ms 58544 KB Output is correct
48 Correct 312 ms 59784 KB Output is correct
49 Correct 232 ms 58988 KB Output is correct
50 Correct 218 ms 41232 KB Output is correct
51 Correct 600 ms 64564 KB Output is correct
52 Correct 365 ms 56592 KB Output is correct
53 Correct 13 ms 19116 KB Output is correct
54 Correct 11 ms 19028 KB Output is correct
55 Correct 13 ms 19028 KB Output is correct
56 Correct 12 ms 19412 KB Output is correct
57 Correct 12 ms 19540 KB Output is correct
58 Correct 13 ms 19456 KB Output is correct
59 Correct 14 ms 19416 KB Output is correct
60 Correct 12 ms 19352 KB Output is correct
61 Correct 13 ms 19432 KB Output is correct
62 Correct 15 ms 19568 KB Output is correct
63 Correct 16 ms 19520 KB Output is correct
64 Correct 13 ms 19540 KB Output is correct
65 Correct 15 ms 19412 KB Output is correct
66 Correct 12 ms 19556 KB Output is correct
67 Correct 298 ms 58412 KB Output is correct
68 Correct 316 ms 58312 KB Output is correct
69 Correct 414 ms 59736 KB Output is correct
70 Correct 383 ms 60996 KB Output is correct
71 Correct 499 ms 61120 KB Output is correct
72 Correct 396 ms 58528 KB Output is correct
73 Correct 319 ms 64448 KB Output is correct
74 Correct 199 ms 56972 KB Output is correct
75 Correct 482 ms 59820 KB Output is correct
76 Correct 454 ms 58180 KB Output is correct
77 Correct 294 ms 57448 KB Output is correct
78 Correct 332 ms 57320 KB Output is correct
79 Correct 272 ms 57292 KB Output is correct
80 Correct 212 ms 56932 KB Output is correct
81 Correct 590 ms 61124 KB Output is correct
82 Correct 618 ms 61560 KB Output is correct
83 Correct 293 ms 57280 KB Output is correct
84 Correct 282 ms 57444 KB Output is correct
85 Correct 598 ms 61312 KB Output is correct
86 Correct 274 ms 57284 KB Output is correct
87 Correct 264 ms 57312 KB Output is correct
88 Correct 294 ms 56296 KB Output is correct
89 Correct 352 ms 56676 KB Output is correct
90 Correct 525 ms 58620 KB Output is correct
91 Correct 560 ms 59424 KB Output is correct
92 Correct 522 ms 61428 KB Output is correct
93 Correct 646 ms 62732 KB Output is correct
94 Correct 569 ms 58504 KB Output is correct
95 Correct 337 ms 59676 KB Output is correct
96 Correct 222 ms 59004 KB Output is correct
97 Correct 194 ms 41200 KB Output is correct
98 Correct 635 ms 64332 KB Output is correct
99 Correct 348 ms 56672 KB Output is correct
100 Correct 49 ms 24276 KB Output is correct
101 Correct 636 ms 60000 KB Output is correct
102 Correct 440 ms 52120 KB Output is correct
103 Correct 445 ms 52308 KB Output is correct
104 Correct 598 ms 57688 KB Output is correct