oj.uz

Submission #575182

# Submission time Handle Problem Language Result Execution time Memory
575182 2022-06-09T20:42:45 Z Sam_a17 Stranded Far From Home (BOI22_island) C++17
100 / 100
 622 ms 73528 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);
  } 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++) {
    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);
      for(auto k: comp[c]) {
        answ[k] = 0;
      }
      st.erase(st.begin());
    }

    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 13 ms 19028 KB Output is correct
2 Correct 10 ms 19028 KB Output is correct
3 Correct 11 ms 19136 KB Output is correct
4 Correct 14 ms 19404 KB Output is correct
5 Correct 12 ms 19540 KB Output is correct
6 Correct 12 ms 19432 KB Output is correct
7 Correct 12 ms 19412 KB Output is correct
8 Correct 12 ms 19352 KB Output is correct
9 Correct 11 ms 19540 KB Output is correct
10 Correct 12 ms 19540 KB Output is correct
11 Correct 12 ms 19540 KB Output is correct
12 Correct 13 ms 19544 KB Output is correct
13 Correct 13 ms 19412 KB Output is correct
14 Correct 13 ms 19540 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 9 ms 19028 KB Output is correct
3 Correct 296 ms 58568 KB Output is correct
4 Correct 282 ms 58348 KB Output is correct
5 Correct 455 ms 63624 KB Output is correct
6 Correct 440 ms 65148 KB Output is correct
7 Correct 438 ms 65652 KB Output is correct
8 Correct 370 ms 58364 KB Output is correct
9 Correct 325 ms 73528 KB Output is correct
10 Correct 222 ms 59784 KB Output is correct
11 Correct 425 ms 59696 KB Output is correct
12 Correct 477 ms 59908 KB Output is correct
13 Correct 310 ms 57272 KB Output is correct
14 Correct 249 ms 57304 KB Output is correct
15 Correct 249 ms 57280 KB Output is correct
16 Correct 193 ms 56904 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 613 ms 67552 KB Output is correct
3 Correct 598 ms 67612 KB Output is correct
4 Correct 297 ms 57348 KB Output is correct
5 Correct 269 ms 57924 KB Output is correct
6 Correct 600 ms 67708 KB Output is correct
7 Correct 265 ms 57268 KB Output is correct
8 Correct 285 ms 57276 KB Output is correct
9 Correct 195 ms 56900 KB Output is correct
10 Correct 280 ms 57312 KB Output is correct
11 Correct 360 ms 58224 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 19028 KB Output is correct
2 Correct 525 ms 61088 KB Output is correct
3 Correct 518 ms 62404 KB Output is correct
4 Correct 541 ms 64212 KB Output is correct
5 Correct 584 ms 62848 KB Output is correct
6 Correct 543 ms 58496 KB Output is correct
7 Correct 303 ms 59704 KB Output is correct
8 Correct 216 ms 58852 KB Output is correct
9 Correct 215 ms 42128 KB Output is correct
10 Correct 553 ms 64412 KB Output is correct
11 Correct 354 ms 57752 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 19028 KB Output is correct
2 Correct 10 ms 19028 KB Output is correct
3 Correct 11 ms 19136 KB Output is correct
4 Correct 14 ms 19404 KB Output is correct
5 Correct 12 ms 19540 KB Output is correct
6 Correct 12 ms 19432 KB Output is correct
7 Correct 12 ms 19412 KB Output is correct
8 Correct 12 ms 19352 KB Output is correct
9 Correct 11 ms 19540 KB Output is correct
10 Correct 12 ms 19540 KB Output is correct
11 Correct 12 ms 19540 KB Output is correct
12 Correct 13 ms 19544 KB Output is correct
13 Correct 13 ms 19412 KB Output is correct
14 Correct 13 ms 19540 KB Output is correct
15 Correct 10 ms 19028 KB Output is correct
16 Correct 9 ms 19028 KB Output is correct
17 Correct 296 ms 58568 KB Output is correct
18 Correct 282 ms 58348 KB Output is correct
19 Correct 455 ms 63624 KB Output is correct
20 Correct 440 ms 65148 KB Output is correct
21 Correct 438 ms 65652 KB Output is correct
22 Correct 370 ms 58364 KB Output is correct
23 Correct 325 ms 73528 KB Output is correct
24 Correct 222 ms 59784 KB Output is correct
25 Correct 425 ms 59696 KB Output is correct
26 Correct 477 ms 59908 KB Output is correct
27 Correct 310 ms 57272 KB Output is correct
28 Correct 249 ms 57304 KB Output is correct
29 Correct 249 ms 57280 KB Output is correct
30 Correct 193 ms 56904 KB Output is correct
31 Correct 10 ms 19028 KB Output is correct
32 Correct 613 ms 67552 KB Output is correct
33 Correct 598 ms 67612 KB Output is correct
34 Correct 297 ms 57348 KB Output is correct
35 Correct 269 ms 57924 KB Output is correct
36 Correct 600 ms 67708 KB Output is correct
37 Correct 265 ms 57268 KB Output is correct
38 Correct 285 ms 57276 KB Output is correct
39 Correct 195 ms 56900 KB Output is correct
40 Correct 280 ms 57312 KB Output is correct
41 Correct 360 ms 58224 KB Output is correct
42 Correct 10 ms 19028 KB Output is correct
43 Correct 525 ms 61088 KB Output is correct
44 Correct 518 ms 62404 KB Output is correct
45 Correct 541 ms 64212 KB Output is correct
46 Correct 584 ms 62848 KB Output is correct
47 Correct 543 ms 58496 KB Output is correct
48 Correct 303 ms 59704 KB Output is correct
49 Correct 216 ms 58852 KB Output is correct
50 Correct 215 ms 42128 KB Output is correct
51 Correct 553 ms 64412 KB Output is correct
52 Correct 354 ms 57752 KB Output is correct
53 Correct 11 ms 19028 KB Output is correct
54 Correct 12 ms 19028 KB Output is correct
55 Correct 10 ms 19028 KB Output is correct
56 Correct 12 ms 19496 KB Output is correct
57 Correct 12 ms 19484 KB Output is correct
58 Correct 11 ms 19480 KB Output is correct
59 Correct 13 ms 19412 KB Output is correct
60 Correct 12 ms 19412 KB Output is correct
61 Correct 13 ms 19516 KB Output is correct
62 Correct 12 ms 19516 KB Output is correct
63 Correct 12 ms 19540 KB Output is correct
64 Correct 14 ms 19676 KB Output is correct
65 Correct 11 ms 19412 KB Output is correct
66 Correct 12 ms 19540 KB Output is correct
67 Correct 280 ms 58384 KB Output is correct
68 Correct 294 ms 58248 KB Output is correct
69 Correct 443 ms 63876 KB Output is correct
70 Correct 429 ms 65148 KB Output is correct
71 Correct 453 ms 65548 KB Output is correct
72 Correct 390 ms 58260 KB Output is correct
73 Correct 277 ms 73516 KB Output is correct
74 Correct 195 ms 59696 KB Output is correct
75 Correct 409 ms 59784 KB Output is correct
76 Correct 477 ms 59880 KB Output is correct
77 Correct 273 ms 57364 KB Output is correct
78 Correct 313 ms 57336 KB Output is correct
79 Correct 234 ms 57288 KB Output is correct
80 Correct 192 ms 56860 KB Output is correct
81 Correct 603 ms 67584 KB Output is correct
82 Correct 587 ms 67708 KB Output is correct
83 Correct 296 ms 57264 KB Output is correct
84 Correct 255 ms 57848 KB Output is correct
85 Correct 617 ms 67700 KB Output is correct
86 Correct 255 ms 57300 KB Output is correct
87 Correct 252 ms 57320 KB Output is correct
88 Correct 284 ms 57308 KB Output is correct
89 Correct 342 ms 58180 KB Output is correct
90 Correct 544 ms 61112 KB Output is correct
91 Correct 526 ms 62392 KB Output is correct
92 Correct 533 ms 64260 KB Output is correct
93 Correct 622 ms 62772 KB Output is correct
94 Correct 523 ms 58596 KB Output is correct
95 Correct 301 ms 59720 KB Output is correct
96 Correct 216 ms 58864 KB Output is correct
97 Correct 207 ms 42104 KB Output is correct
98 Correct 573 ms 64352 KB Output is correct
99 Correct 344 ms 57704 KB Output is correct
100 Correct 55 ms 24252 KB Output is correct
101 Correct 601 ms 63836 KB Output is correct
102 Correct 435 ms 52116 KB Output is correct
103 Correct 454 ms 53820 KB Output is correct
104 Correct 574 ms 59872 KB Output is correct