oj.uz

Submission #1086433

# Submission time Handle Problem Language Result Execution time Memory
1086433 2024-09-10T15:35:31 Z steveonalex Stranded Far From Home (BOI22_island) C++17
100 / 100
 230 ms 49392 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
#define block_of_code if(true)
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

struct DSU{
    int n;
    vector<int> parent, sz;
    vector<ll> sum;

    DSU(int _n){
        n = _n;
        parent.resize(n+1); sz.resize(n+1, 1);
        sum.resize(n+1);
        for(int i = 1; i<=n; ++i) parent[i] = i;
    }

    int find_set(int u){return (u == parent[u]) ? u : (parent[u] = find_set(parent[u]));}
    bool same_set(int u, int v){return find_set(u) == find_set(v);}

    bool join_set(int u, int v){
        u = find_set(u), v = find_set(v);
        if (u != v){
            if (sz[u] < sz[v]) swap(u, v);
            parent[v] = u;
            sz[u] += sz[v];
            sum[u] += sum[v];
            return true;
        }
        return false;
    }

    int get_size(int u){return sz[find_set(u)];}
    ll get_sum(int u){return sum[find_set(u)];}
};

const int N = 2e5 + 69;
int n, m;
int a[N];
vector<int> graph[N];

int main(void){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
    clock_t start = clock();

    cin >> n >> m;
    for(int i = 1; i<=n; ++i) cin >> a[i];
    for(int i = 0; i<m; ++i){
        int u, v; cin >> u >> v;
        graph[u].push_back(v);
        graph[v].push_back(u);
    }

    vector<int> val;
    for(int i = 1; i<=n; ++i) val.push_back(a[i]);
    remove_dup(val);

    int k = val.size();
    vector<vector<int>> ver(k);
    vector<vector<pair<int, ll>>> queries(k);
    for(int i = 1; i<=n; ++i){
        int idx = lower_bound(ALL(val), a[i]) - val.begin();
        ver[idx].push_back(i);
        queries[idx].push_back({i, a[i]});
    }

    DSU mst(n);
    for(int i = 1; i<=n; ++i) mst.sum[i] = a[i];

    vector<ll> ans(n+1);
    for(int i = 0; i< val.size(); ++i){
        for(int u: ver[i]){
            for(int v: graph[u]) if (a[v] <= a[u]) mst.join_set(u, v);
        }

        while(queries[i].size()){
            pair<int, ll> cur = queries[i].back(); queries[i].pop_back();
            ans[cur.first] = cur.second;
            ll sigma = mst.get_sum(cur.first);
            if (sigma > cur.second){
                int idx = upper_bound(ALL(val), sigma) - val.begin() - 1;
                queries[idx].push_back({cur.first, sigma});
            }
        }
    }   


    string s;
    for(int i = 1; i<=n; ++i) if (ans[i] == mst.get_sum(i)) s.push_back('1');
    else s.push_back('0');

    cout << s << "\n"; 

    cerr << "Time elapsed: " << clock() - start << " ms\n";
    return 0;
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:120:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     for(int i = 0; i< val.size(); ++i){
      |                    ~^~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 3 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 5468 KB Output is correct
5 Correct 3 ms 5468 KB Output is correct
6 Correct 2 ms 5212 KB Output is correct
7 Correct 3 ms 5468 KB Output is correct
8 Correct 3 ms 5468 KB Output is correct
9 Correct 3 ms 5168 KB Output is correct
10 Correct 3 ms 5424 KB Output is correct
11 Correct 4 ms 5464 KB Output is correct
12 Correct 3 ms 5468 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 145 ms 49392 KB Output is correct
4 Correct 75 ms 26044 KB Output is correct
5 Correct 141 ms 47100 KB Output is correct
6 Correct 139 ms 44124 KB Output is correct
7 Correct 155 ms 48332 KB Output is correct
8 Correct 95 ms 33552 KB Output is correct
9 Correct 106 ms 42828 KB Output is correct
10 Correct 84 ms 40260 KB Output is correct
11 Correct 63 ms 26436 KB Output is correct
12 Correct 73 ms 26052 KB Output is correct
13 Correct 76 ms 25024 KB Output is correct
14 Correct 70 ms 26064 KB Output is correct
15 Correct 128 ms 48196 KB Output is correct
16 Correct 88 ms 47816 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 228 ms 48484 KB Output is correct
3 Correct 216 ms 44656 KB Output is correct
4 Correct 80 ms 26636 KB Output is correct
5 Correct 67 ms 25024 KB Output is correct
6 Correct 221 ms 48836 KB Output is correct
7 Correct 135 ms 48204 KB Output is correct
8 Correct 148 ms 48196 KB Output is correct
9 Correct 90 ms 47820 KB Output is correct
10 Correct 93 ms 37284 KB Output is correct
11 Correct 82 ms 29124 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 100 ms 30496 KB Output is correct
3 Correct 93 ms 31032 KB Output is correct
4 Correct 101 ms 31180 KB Output is correct
5 Correct 87 ms 26552 KB Output is correct
6 Correct 83 ms 25716 KB Output is correct
7 Correct 75 ms 34312 KB Output is correct
8 Correct 75 ms 28948 KB Output is correct
9 Correct 64 ms 19160 KB Output is correct
10 Correct 76 ms 25032 KB Output is correct
11 Correct 79 ms 29888 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 3 ms 4956 KB Output is correct
3 Correct 2 ms 4956 KB Output is correct
4 Correct 3 ms 5468 KB Output is correct
5 Correct 3 ms 5468 KB Output is correct
6 Correct 2 ms 5212 KB Output is correct
7 Correct 3 ms 5468 KB Output is correct
8 Correct 3 ms 5468 KB Output is correct
9 Correct 3 ms 5168 KB Output is correct
10 Correct 3 ms 5424 KB Output is correct
11 Correct 4 ms 5464 KB Output is correct
12 Correct 3 ms 5468 KB Output is correct
13 Correct 3 ms 5212 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 3 ms 4956 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 145 ms 49392 KB Output is correct
18 Correct 75 ms 26044 KB Output is correct
19 Correct 141 ms 47100 KB Output is correct
20 Correct 139 ms 44124 KB Output is correct
21 Correct 155 ms 48332 KB Output is correct
22 Correct 95 ms 33552 KB Output is correct
23 Correct 106 ms 42828 KB Output is correct
24 Correct 84 ms 40260 KB Output is correct
25 Correct 63 ms 26436 KB Output is correct
26 Correct 73 ms 26052 KB Output is correct
27 Correct 76 ms 25024 KB Output is correct
28 Correct 70 ms 26064 KB Output is correct
29 Correct 128 ms 48196 KB Output is correct
30 Correct 88 ms 47816 KB Output is correct
31 Correct 2 ms 4952 KB Output is correct
32 Correct 228 ms 48484 KB Output is correct
33 Correct 216 ms 44656 KB Output is correct
34 Correct 80 ms 26636 KB Output is correct
35 Correct 67 ms 25024 KB Output is correct
36 Correct 221 ms 48836 KB Output is correct
37 Correct 135 ms 48204 KB Output is correct
38 Correct 148 ms 48196 KB Output is correct
39 Correct 90 ms 47820 KB Output is correct
40 Correct 93 ms 37284 KB Output is correct
41 Correct 82 ms 29124 KB Output is correct
42 Correct 2 ms 4956 KB Output is correct
43 Correct 100 ms 30496 KB Output is correct
44 Correct 93 ms 31032 KB Output is correct
45 Correct 101 ms 31180 KB Output is correct
46 Correct 87 ms 26552 KB Output is correct
47 Correct 83 ms 25716 KB Output is correct
48 Correct 75 ms 34312 KB Output is correct
49 Correct 75 ms 28948 KB Output is correct
50 Correct 64 ms 19160 KB Output is correct
51 Correct 76 ms 25032 KB Output is correct
52 Correct 79 ms 29888 KB Output is correct
53 Correct 3 ms 4952 KB Output is correct
54 Correct 2 ms 4956 KB Output is correct
55 Correct 2 ms 4952 KB Output is correct
56 Correct 3 ms 5468 KB Output is correct
57 Correct 4 ms 5356 KB Output is correct
58 Correct 4 ms 5168 KB Output is correct
59 Correct 3 ms 5464 KB Output is correct
60 Correct 4 ms 5464 KB Output is correct
61 Correct 3 ms 5212 KB Output is correct
62 Correct 3 ms 5464 KB Output is correct
63 Correct 3 ms 5424 KB Output is correct
64 Correct 3 ms 5464 KB Output is correct
65 Correct 2 ms 5212 KB Output is correct
66 Correct 3 ms 5212 KB Output is correct
67 Correct 121 ms 49344 KB Output is correct
68 Correct 72 ms 26044 KB Output is correct
69 Correct 130 ms 47052 KB Output is correct
70 Correct 129 ms 43972 KB Output is correct
71 Correct 129 ms 48332 KB Output is correct
72 Correct 92 ms 33400 KB Output is correct
73 Correct 114 ms 42820 KB Output is correct
74 Correct 84 ms 40260 KB Output is correct
75 Correct 67 ms 26432 KB Output is correct
76 Correct 77 ms 26052 KB Output is correct
77 Correct 69 ms 24980 KB Output is correct
78 Correct 70 ms 25988 KB Output is correct
79 Correct 109 ms 48200 KB Output is correct
80 Correct 109 ms 47820 KB Output is correct
81 Correct 213 ms 48588 KB Output is correct
82 Correct 194 ms 44488 KB Output is correct
83 Correct 74 ms 26556 KB Output is correct
84 Correct 98 ms 24968 KB Output is correct
85 Correct 205 ms 48692 KB Output is correct
86 Correct 130 ms 48120 KB Output is correct
87 Correct 130 ms 48192 KB Output is correct
88 Correct 119 ms 37316 KB Output is correct
89 Correct 98 ms 29120 KB Output is correct
90 Correct 91 ms 30408 KB Output is correct
91 Correct 95 ms 30948 KB Output is correct
92 Correct 91 ms 31180 KB Output is correct
93 Correct 117 ms 26556 KB Output is correct
94 Correct 83 ms 25836 KB Output is correct
95 Correct 78 ms 34200 KB Output is correct
96 Correct 60 ms 28868 KB Output is correct
97 Correct 78 ms 19140 KB Output is correct
98 Correct 80 ms 25028 KB Output is correct
99 Correct 94 ms 29876 KB Output is correct
100 Correct 29 ms 9552 KB Output is correct
101 Correct 196 ms 44240 KB Output is correct
102 Correct 74 ms 22748 KB Output is correct
103 Correct 167 ms 38600 KB Output is correct
104 Correct 230 ms 47804 KB Output is correct