oj.uz

Submission #888136

# Submission time Handle Problem Language Result Execution time Memory
888136 2023-12-16T08:19:11 Z Shayan86 Construction of Highway (JOI18_construction) C++14
7 / 100
 2000 ms 7156 KB 
#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// Ofast, O0, O1, O2, O3, unroll-loops, fast-math, trapv

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;

#define Mp          make_pair
#define sep         ' '
#define endl        '\n'
#define F	        first
#define S	        second
#define pb          push_back
#define all(x)      (x).begin(),(x).end()
#define kill(res)	cout << res << '\n', exit(0);
#define set_dec(x)	cout << fixed << setprecision(x);
#define fast_io     ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io     freopen("input.txt", "r", stdin) ; freopen("output.txt", "w", stdout);

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll L = 19;
const ll sq = 1000;
const ll N = 1e5 + 50;
const ll Mod = 1e9 + 7;

ll n, c[N], par[N][L], h[N], mx[N];

vector<int> edge, adj[N];

void dfs(int v, int p = 0){
    par[v][0] = p;
    for(int i = 1; i < L; i++){
        if(!par[v][i-1]) break;
        par[v][i] = par[par[v][i-1]][i-1];
    }
    for(int u: adj[v]){
        h[u] = h[v] + 1; dfs(u, v);
    }
}

int getPar(int v, int k){
    for(int i = 0; i < L; i++){
        if(k >> i & 1) v = par[v][i];
    }
    return v;
}

int lca(int v, int u){
    if(h[v] < h[u]) swap(u, v);
    v = getPar(v, h[v] - h[u]);
    if(u == v) return v;

    for(int i = L-1; i >= 0; i--){
        if(par[v][i] != par[u][i]){
            v = par[v][i]; u = par[u][i];
        }
    }
    return par[v][0];
}

void prep(int v){
    for(int u: adj[v]){
        prep(u); mx[v] = max(mx[v], mx[u]);
    }
    if(mx[v]) c[v] = c[edge[mx[v]]];
}

vector<int> vec;
vector<pii> block;
/*
int bit[N], m;

void upd(int x, int y){
    for(; x <= m; x += x & (-x)) bit[x] += y;
}

int get(int x){
    int out = 0;
    for(; x; x -= x & (-x)) out += bit[x];
    return out;
}

ll solve(){
    vec.clear();
    for(auto i: block) vec.pb(i.F);

    sort(all(vec)); vec.resize(unique(all(vec)) - vec.begin());
    m = vec.size();

    int sum = 0; ll res = 0;
    for(auto [x, y]: block){
        int id = lower_bound(all(vec), x) - vec.begin() + 1;
        res += (sum - get(id)); upd(id, y); sum += y;
    }

    for(auto [x, y]: block){
        int id = lower_bound(all(vec), x) - vec.begin() + 1; upd(id, -y);
    }
    return res;
}
*/
int main(){
    fast_io;

    cin >> n;

    for(int i = 1; i <= n; i++) cin >> c[i];

    int u, v; edge.pb(1);
    for(int i = 1; i < n; i++){
        cin >> u >> v;
        adj[u].pb(v); edge.pb(v);
    }

    dfs(1);

    for(int i = 1; i < n; i++){
        block.clear(); 
        int tah = -1; v = edge[i];
        for(int j = i-1; j > 0; j--){
            u = lca(v, edge[j]);
            if(h[u] > tah){
                block.pb({c[edge[j]], h[u] - tah});
                tah = h[u];
            }
        }
        /*vec.clear();
        while(h[v] - 1 > tah){
            v = par[v][0]; vec.pb(c[v]);
        }
        reverse(all(vec));

        for(int j: vec) block.pb({j, 1});*/

        vec.clear();
        for(auto [x, y]: block) for(int j = 0; j < y; j++) vec.pb(x);

        ll res = 0;
        for(int j = 0; j < vec.size(); j++) for(int k = j+1; k < vec.size(); k++) if(vec[j] > vec[k]) res++;
        cout << res << endl;

        //cout << solve() << endl;
/*
        if(i % sq == 0){
            fill(mx, mx + N, 0);
            for(int j = i; j > i - sq; j--) mx[edge[j]] = j;
            prep(1);
        }*/
    }

}

Compilation message

construction.cpp: In function 'int main()':
construction.cpp:141:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  141 |         for(auto [x, y]: block) for(int j = 0; j < y; j++) vec.pb(x);
      |                  ^
construction.cpp:144:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  144 |         for(int j = 0; j < vec.size(); j++) for(int k = j+1; k < vec.size(); k++) if(vec[j] > vec[k]) res++;
      |                        ~~^~~~~~~~~~~~
construction.cpp:144:64: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  144 |         for(int j = 0; j < vec.size(); j++) for(int k = j+1; k < vec.size(); k++) if(vec[j] > vec[k]) res++;
      |                                                              ~~^~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 3 ms 4700 KB Output is correct
5 Correct 9 ms 4700 KB Output is correct
6 Correct 8 ms 4700 KB Output is correct
7 Correct 8 ms 4700 KB Output is correct
8 Correct 10 ms 4696 KB Output is correct
9 Correct 10 ms 4700 KB Output is correct
10 Correct 10 ms 4700 KB Output is correct
11 Correct 7 ms 4696 KB Output is correct
12 Correct 7 ms 4700 KB Output is correct
13 Correct 7 ms 4700 KB Output is correct
14 Correct 7 ms 4700 KB Output is correct
15 Correct 5 ms 4612 KB Output is correct
16 Correct 5 ms 4700 KB Output is correct
17 Correct 5 ms 4700 KB Output is correct
18 Correct 5 ms 4776 KB Output is correct
19 Correct 8 ms 4700 KB Output is correct
20 Correct 8 ms 4748 KB Output is correct
21 Correct 8 ms 4696 KB Output is correct
22 Correct 9 ms 4772 KB Output is correct
23 Correct 7 ms 4700 KB Output is correct
24 Correct 8 ms 4540 KB Output is correct
25 Correct 9 ms 4700 KB Output is correct
26 Correct 10 ms 4700 KB Output is correct
27 Correct 7 ms 4696 KB Output is correct
28 Correct 7 ms 4700 KB Output is correct
29 Correct 7 ms 4700 KB Output is correct
30 Correct 5 ms 4700 KB Output is correct
31 Correct 5 ms 4700 KB Output is correct
32 Correct 8 ms 4772 KB Output is correct
33 Correct 8 ms 4700 KB Output is correct
34 Correct 9 ms 4776 KB Output is correct
35 Correct 9 ms 4700 KB Output is correct
36 Correct 9 ms 4768 KB Output is correct
37 Correct 9 ms 5024 KB Output is correct
38 Correct 9 ms 4768 KB Output is correct
39 Correct 9 ms 4700 KB Output is correct
40 Correct 9 ms 4952 KB Output is correct
41 Correct 8 ms 4700 KB Output is correct
42 Correct 9 ms 4700 KB Output is correct
43 Correct 11 ms 4900 KB Output is correct
44 Correct 9 ms 4700 KB Output is correct

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 3 ms 4700 KB Output is correct
5 Correct 9 ms 4700 KB Output is correct
6 Correct 8 ms 4700 KB Output is correct
7 Correct 8 ms 4700 KB Output is correct
8 Correct 10 ms 4696 KB Output is correct
9 Correct 10 ms 4700 KB Output is correct
10 Correct 10 ms 4700 KB Output is correct
11 Correct 7 ms 4696 KB Output is correct
12 Correct 7 ms 4700 KB Output is correct
13 Correct 7 ms 4700 KB Output is correct
14 Correct 7 ms 4700 KB Output is correct
15 Correct 5 ms 4612 KB Output is correct
16 Correct 5 ms 4700 KB Output is correct
17 Correct 5 ms 4700 KB Output is correct
18 Correct 5 ms 4776 KB Output is correct
19 Correct 8 ms 4700 KB Output is correct
20 Correct 8 ms 4748 KB Output is correct
21 Correct 8 ms 4696 KB Output is correct
22 Correct 9 ms 4772 KB Output is correct
23 Correct 7 ms 4700 KB Output is correct
24 Correct 8 ms 4540 KB Output is correct
25 Correct 9 ms 4700 KB Output is correct
26 Correct 10 ms 4700 KB Output is correct
27 Correct 7 ms 4696 KB Output is correct
28 Correct 7 ms 4700 KB Output is correct
29 Correct 7 ms 4700 KB Output is correct
30 Correct 5 ms 4700 KB Output is correct
31 Correct 5 ms 4700 KB Output is correct
32 Correct 8 ms 4772 KB Output is correct
33 Correct 8 ms 4700 KB Output is correct
34 Correct 9 ms 4776 KB Output is correct
35 Correct 9 ms 4700 KB Output is correct
36 Correct 9 ms 4768 KB Output is correct
37 Correct 9 ms 5024 KB Output is correct
38 Correct 9 ms 4768 KB Output is correct
39 Correct 9 ms 4700 KB Output is correct
40 Correct 9 ms 4952 KB Output is correct
41 Correct 8 ms 4700 KB Output is correct
42 Correct 9 ms 4700 KB Output is correct
43 Correct 11 ms 4900 KB Output is correct
44 Correct 9 ms 4700 KB Output is correct
45 Correct 27 ms 4952 KB Output is correct
46 Correct 432 ms 6744 KB Output is correct
47 Correct 439 ms 6976 KB Output is correct
48 Correct 419 ms 6980 KB Output is correct
49 Execution timed out 2093 ms 7156 KB Time limit exceeded
50 Halted 0 ms 0 KB -

Subtask #3
0 / 84.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4700 KB Output is correct
2 Correct 1 ms 4700 KB Output is correct
3 Correct 1 ms 4700 KB Output is correct
4 Correct 3 ms 4700 KB Output is correct
5 Correct 9 ms 4700 KB Output is correct
6 Correct 8 ms 4700 KB Output is correct
7 Correct 8 ms 4700 KB Output is correct
8 Correct 10 ms 4696 KB Output is correct
9 Correct 10 ms 4700 KB Output is correct
10 Correct 10 ms 4700 KB Output is correct
11 Correct 7 ms 4696 KB Output is correct
12 Correct 7 ms 4700 KB Output is correct
13 Correct 7 ms 4700 KB Output is correct
14 Correct 7 ms 4700 KB Output is correct
15 Correct 5 ms 4612 KB Output is correct
16 Correct 5 ms 4700 KB Output is correct
17 Correct 5 ms 4700 KB Output is correct
18 Correct 5 ms 4776 KB Output is correct
19 Correct 8 ms 4700 KB Output is correct
20 Correct 8 ms 4748 KB Output is correct
21 Correct 8 ms 4696 KB Output is correct
22 Correct 9 ms 4772 KB Output is correct
23 Correct 7 ms 4700 KB Output is correct
24 Correct 8 ms 4540 KB Output is correct
25 Correct 9 ms 4700 KB Output is correct
26 Correct 10 ms 4700 KB Output is correct
27 Correct 7 ms 4696 KB Output is correct
28 Correct 7 ms 4700 KB Output is correct
29 Correct 7 ms 4700 KB Output is correct
30 Correct 5 ms 4700 KB Output is correct
31 Correct 5 ms 4700 KB Output is correct
32 Correct 8 ms 4772 KB Output is correct
33 Correct 8 ms 4700 KB Output is correct
34 Correct 9 ms 4776 KB Output is correct
35 Correct 9 ms 4700 KB Output is correct
36 Correct 9 ms 4768 KB Output is correct
37 Correct 9 ms 5024 KB Output is correct
38 Correct 9 ms 4768 KB Output is correct
39 Correct 9 ms 4700 KB Output is correct
40 Correct 9 ms 4952 KB Output is correct
41 Correct 8 ms 4700 KB Output is correct
42 Correct 9 ms 4700 KB Output is correct
43 Correct 11 ms 4900 KB Output is correct
44 Correct 9 ms 4700 KB Output is correct
45 Correct 27 ms 4952 KB Output is correct
46 Correct 432 ms 6744 KB Output is correct
47 Correct 439 ms 6976 KB Output is correct
48 Correct 419 ms 6980 KB Output is correct
49 Execution timed out 2093 ms 7156 KB Time limit exceeded
50 Halted 0 ms 0 KB -