oj.uz

Submission #762051

# Submission time Handle Problem Language Result Execution time Memory
762051 2023-06-20T16:57:45 Z GrindMachine Rigged Roads (NOI19_riggedroads) C++17
58 / 100
 2000 ms 67772 KB 
// Om Namah Shivaya

#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) 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

/*



*/

const int MOD = 1e9 + 7;
const int N = 3e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<pii> adj[N];
vector<int> curr, path;
set<int> st[N];
vector<int> first(N,-1);
vector<int> enter[N];

void dfs(int u, int p){
    for(auto [v,id] : adj[u]){
        if(v == p) conts;
        dfs(v,u);

        if(!st[v].empty()){
            first[id] = *st[v].begin();
        }
    }

    int mx = -1, largest = -1;
    for(auto [v,id] : adj[u]){
        if(v == p) conts;
        if(sz(st[v]) > mx){
            mx = sz(st[v]);
            largest = v;
        }
    }

    if(largest != -1){
        swap(st[u], st[largest]);
        st[largest].clear();
    }

    for(auto [v,id] : adj[u]){
        if(v == p or v == largest) conts;
    
        trav(x,st[v]){
            if(st[u].count(x)){
                st[u].erase(x);
            }
            else{
                st[u].insert(x);
            }
        }

        st[v].clear();
    }

    trav(x,enter[u]){
        if(st[u].count(x)){
            st[u].erase(x);
        }
        else{
            st[u].insert(x);
        }
    }
}

void solve(int test_case)
{
    int n,m; cin >> n >> m;
    vector<pii> edges(m+5);

    rep1(i,m){
        int u,v; cin >> u >> v;
        edges[i] = {u,v};
    }

    vector<bool> in_mst(m+5);
    rep1(i,n-1){
        int id; cin >> id;
        in_mst[id] = 1;
        auto [u,v] = edges[id];
        adj[u].pb({v,id}), adj[v].pb({u,id});
    }

    rep1(i,m){
        if(!in_mst[i]){
            auto [u,v] = edges[i];
            enter[u].pb(i);
            enter[v].pb(i);
        }
    }

    dfs(1,-1);

    vector<int> here[m+5];
    rep1(i,m){
        if(first[i] != -1){
            here[first[i]].pb(i);
        }
    }

    vector<int> ans(m+5,-1);
    int ptr = 1;

    rep1(i,m){
        if(ans[i] != -1) conts;
        if(in_mst[i]){
            ans[i] = ptr++;
            conts;
        }

        auto ids = here[i];
        sort(all(ids));

        trav(id,ids){
            if(ans[id] != -1) conts;
            ans[id] = ptr++;
        }

        ans[i] = ptr++;
    }

    rep1(i,m) cout << ans[i] << " ";
    cout << endl;
}

int main()
{
    fastio;

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

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

    return 0;
}

Compilation message

riggedroads.cpp: In function 'void dfs(int, int)':
riggedroads.cpp:81:22: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   81 |         if(sz(st[v]) > mx){
      |                      ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 29652 KB Output is correct
2 Correct 12 ms 29552 KB Output is correct
3 Correct 14 ms 29652 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 29652 KB Output is correct
2 Correct 12 ms 29552 KB Output is correct
3 Correct 14 ms 29652 KB Output is correct
4 Correct 13 ms 29736 KB Output is correct
5 Correct 13 ms 29704 KB Output is correct
6 Correct 16 ms 29808 KB Output is correct
7 Correct 13 ms 29652 KB Output is correct
8 Correct 14 ms 29752 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 38852 KB Output is correct
2 Correct 132 ms 50844 KB Output is correct
3 Correct 314 ms 67772 KB Output is correct
4 Correct 100 ms 52672 KB Output is correct
5 Correct 111 ms 54736 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2066 ms 48072 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 157 ms 58192 KB Output is correct
2 Correct 199 ms 66136 KB Output is correct
3 Correct 47 ms 39844 KB Output is correct
4 Correct 67 ms 45052 KB Output is correct
5 Correct 214 ms 63448 KB Output is correct

Subtask #6
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 115 ms 51820 KB Output is correct
2 Correct 71 ms 45336 KB Output is correct
3 Correct 205 ms 58356 KB Output is correct
4 Correct 229 ms 55756 KB Output is correct
5 Correct 24 ms 31700 KB Output is correct

Subtask #7
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 29652 KB Output is correct
2 Correct 12 ms 29552 KB Output is correct
3 Correct 14 ms 29652 KB Output is correct
4 Correct 13 ms 29736 KB Output is correct
5 Correct 13 ms 29704 KB Output is correct
6 Correct 16 ms 29808 KB Output is correct
7 Correct 13 ms 29652 KB Output is correct
8 Correct 14 ms 29752 KB Output is correct
9 Correct 48 ms 38852 KB Output is correct
10 Correct 132 ms 50844 KB Output is correct
11 Correct 314 ms 67772 KB Output is correct
12 Correct 100 ms 52672 KB Output is correct
13 Correct 111 ms 54736 KB Output is correct
14 Execution timed out 2066 ms 48072 KB Time limit exceeded
15 Halted 0 ms 0 KB -