oj.uz

Submission #963949

# Submission time Handle Problem Language Result Execution time Memory
963949 2024-04-16T05:13:18 Z GrindMachine Reconstruction Project (JOI22_reconstruction) C++17
42 / 100
 5000 ms 790448 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*

refs:
some solutions

*/

const int MOD = 1e9 + 7;
const int N = 500 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

struct DSU {
    vector<int> par, rankk, siz;

    DSU() {

    }

    DSU(int n) {
        init(n);
    }

    void init(int n) {
        par = vector<int>(n + 1);
        rankk = vector<int>(n + 1);
        siz = vector<int>(n + 1);
        rep(i, n + 1) create(i);
    }

    void create(int u) {
        par[u] = u;
        rankk[u] = 0;
        siz[u] = 1;
    }

    int find(int u) {
        if (u == par[u]) return u;
        else return par[u] = find(par[u]);
    }

    bool same(int u, int v) {
        return find(u) == find(v);
    }

    void merge(int u, int v) {
        u = find(u), v = find(v);
        if (u == v) return;

        if (rankk[u] == rankk[v]) rankk[u]++;
        if (rankk[u] < rankk[v]) swap(u, v);

        par[v] = u;
        siz[u] += siz[v];
    }
};

vector<pll> adj[N];
vector<ll> active;
ll mn_on_path;

void dfs1(ll u, ll p, ll des, ll mn){
    if(u == des){
        mn_on_path = mn;
    }

    for(auto [v,id] : adj[u]){
        if(v == p) conts;
        dfs1(v,u,des,min(mn,id));
    }
} 

void solve(int test_case)
{
    ll n,m; cin >> n >> m;
    vector<array<ll,3>> edges(m+5);
    rep1(i,m){
        ll u,v,w; cin >> u >> v >> w;
        edges[i] = {w,u,v};
    }

    sort(edges.begin()+1,edges.begin()+m+1);

    vector<ll> edges_front[m+5], edges_back[m+5];

    rep1(i,m){
        mn_on_path = inf2;
        auto [w,u,v] = edges[i];
        dfs1(u,-1,v,inf2);
        if(mn_on_path != inf2){
            auto [w,x,y] = edges[mn_on_path];
            active.erase(find(all(active),mn_on_path));
            pll px = {x,mn_on_path}, py = {y,mn_on_path};
            adj[x].erase(find(all(adj[x]),py));
            adj[y].erase(find(all(adj[y]),px));
        }

        active.pb(i);
        adj[u].pb({v,i}), adj[v].pb({u,i});

        edges_front[i] = active;
    }

    rep1(i,n){
        adj[i].clear();
    }

    active.clear();

    rev(i,m,1){
        mn_on_path = inf2;
        auto [w,u,v] = edges[i];
        dfs1(u,-1,v,inf2);
        if(mn_on_path != inf2){
            mn_on_path = -mn_on_path;
            auto [w,x,y] = edges[mn_on_path];
            active.erase(find(all(active),mn_on_path));
            pll px = {x,-mn_on_path}, py = {y,-mn_on_path};
            adj[x].erase(find(all(adj[x]),py));
            adj[y].erase(find(all(adj[y]),px));
        }

        active.pb(i);
        adj[u].pb({v,-i}), adj[v].pb({u,-i});

        edges_back[i] = active;
    }

    ll q; cin >> q;

    while(q--){
        ll x; cin >> x;
        array<ll,3> ar = {x,-1,-1};
        ll pos = lower_bound(edges.begin()+1,edges.begin()+m+1,ar)-edges.begin();
        vector<array<ll,3>> curr_edges;
        trav(id,edges_front[pos-1]){
            auto [w,u,v] = edges[id];
            w = abs(w-x);
            curr_edges.pb({w,u,v});
        }
        trav(id,edges_back[pos]){
            auto [w,u,v] = edges[id];
            w = abs(w-x);
            curr_edges.pb({w,u,v});
        }

        sort(all(curr_edges));

        DSU dsu(n+5);
        ll ans = 0;

        for(auto [w,u,v] : curr_edges){
            if(dsu.same(u,v)) conts;
            dsu.merge(u,v);
            ans += w;
        }

        cout << ans << endl;
    }
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 472 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 0 ms 352 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 472 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1437 ms 789652 KB Output is correct
21 Correct 930 ms 748988 KB Output is correct
22 Correct 1262 ms 780632 KB Output is correct
23 Correct 1404 ms 787676 KB Output is correct
24 Correct 1275 ms 789052 KB Output is correct
25 Correct 1224 ms 789368 KB Output is correct
26 Correct 1322 ms 789688 KB Output is correct
27 Correct 1317 ms 789892 KB Output is correct
28 Correct 1292 ms 789700 KB Output is correct
29 Correct 939 ms 776064 KB Output is correct
30 Correct 1286 ms 789660 KB Output is correct
31 Correct 1356 ms 789780 KB Output is correct
32 Correct 1283 ms 789604 KB Output is correct
33 Correct 1288 ms 789608 KB Output is correct
34 Correct 709 ms 663648 KB Output is correct
35 Correct 1245 ms 789572 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Execution timed out 5079 ms 789316 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 472 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 0 ms 468 KB Output is correct
20 Execution timed out 5035 ms 10704 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 472 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1437 ms 789652 KB Output is correct
21 Correct 930 ms 748988 KB Output is correct
22 Correct 1262 ms 780632 KB Output is correct
23 Correct 1404 ms 787676 KB Output is correct
24 Correct 1275 ms 789052 KB Output is correct
25 Correct 1224 ms 789368 KB Output is correct
26 Correct 1322 ms 789688 KB Output is correct
27 Correct 1317 ms 789892 KB Output is correct
28 Correct 1292 ms 789700 KB Output is correct
29 Correct 939 ms 776064 KB Output is correct
30 Correct 1286 ms 789660 KB Output is correct
31 Correct 1356 ms 789780 KB Output is correct
32 Correct 1283 ms 789604 KB Output is correct
33 Correct 1288 ms 789608 KB Output is correct
34 Correct 709 ms 663648 KB Output is correct
35 Correct 1245 ms 789572 KB Output is correct
36 Correct 3136 ms 790404 KB Output is correct
37 Correct 2354 ms 750356 KB Output is correct
38 Correct 2903 ms 781204 KB Output is correct
39 Correct 3071 ms 788300 KB Output is correct
40 Correct 3060 ms 789688 KB Output is correct
41 Correct 2998 ms 790092 KB Output is correct
42 Correct 3067 ms 790060 KB Output is correct
43 Correct 3065 ms 790148 KB Output is correct
44 Correct 2530 ms 790228 KB Output is correct
45 Correct 1879 ms 776572 KB Output is correct
46 Correct 3055 ms 790196 KB Output is correct
47 Correct 3057 ms 790332 KB Output is correct
48 Correct 3182 ms 790448 KB Output is correct
49 Correct 3021 ms 790256 KB Output is correct
50 Correct 1070 ms 664112 KB Output is correct
51 Correct 2606 ms 790044 KB Output is correct

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 472 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1437 ms 789652 KB Output is correct
21 Correct 930 ms 748988 KB Output is correct
22 Correct 1262 ms 780632 KB Output is correct
23 Correct 1404 ms 787676 KB Output is correct
24 Correct 1275 ms 789052 KB Output is correct
25 Correct 1224 ms 789368 KB Output is correct
26 Correct 1322 ms 789688 KB Output is correct
27 Correct 1317 ms 789892 KB Output is correct
28 Correct 1292 ms 789700 KB Output is correct
29 Correct 939 ms 776064 KB Output is correct
30 Correct 1286 ms 789660 KB Output is correct
31 Correct 1356 ms 789780 KB Output is correct
32 Correct 1283 ms 789604 KB Output is correct
33 Correct 1288 ms 789608 KB Output is correct
34 Correct 709 ms 663648 KB Output is correct
35 Correct 1245 ms 789572 KB Output is correct
36 Correct 1 ms 344 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Execution timed out 5079 ms 789316 KB Time limit exceeded
40 Halted 0 ms 0 KB -