oj.uz

Submission #985038

# Submission time Handle Problem Language Result Execution time Memory
985038 2024-05-17T09:54:23 Z GrindMachine Passport (JOI23_passport) C++17
0 / 100
 64 ms 52468 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(...) 42
#endif

/*

read some solutions long back, remember some key ideas from there

*/

const int MOD = 1e9 + 7;
const int N = 4e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<pii> adj[N];

template<typename T>
struct segtree {
    // https://codeforces.com/blog/entry/18051

    int n;

    segtree() {

    }

    segtree(int siz) {
        init(siz);
    }

    void init(int siz) {
        n = siz;
        build();
    }

    void build() {
        rep1(i,n-1){
            adj[i<<1].pb({i,0});
            adj[i<<1|1].pb({i,0});
        }
    }

    void rupd(int l, int r, int i){
        for(l += n, r += n; l <= r; l >>= 1, r >>= 1){
            if(l&1){
                adj[l].pb({i,0});
                l++;
            }

            if(!(r&1)){
                adj[r].pb({i,0});
                r--;
            }
        }
    }
};

void solve(int test_case)
{
    int n; cin >> n;
    vector<pii> a(n);
    rep(i,n) cin >> a[i].ff >> a[i].ss;
    rep(i,n) a[i].ff--, a[i].ss--;

    segtree<int> st(n);
    int ptr = 2*n;

    rep(i,n){
        auto [l,r] = a[i];
        adj[ptr].pb({i+n,1});
        st.rupd(l,r,ptr);
        ptr++;
    }

    auto dijkstra = [&](int s){
        deque<pii> dq;
        vector<bool> vis(3*n+5);
        vector<int> dis(3*n+5,inf1);
        dq.pb({0,s});

        while(!dq.empty()){
            auto [cost,u] = dq.front();
            dq.pop_front();

            if(vis[u]) conts;
            vis[u] = 1;
            dis[u] = cost;

            for(auto [v,w] : adj[u]){
                if(!w){
                    dq.push_front({cost,v});
                }
                else{
                    dq.pb({cost+1,v});
                }
            }
        }

        return dis;
    };

    auto d1 = dijkstra(0+n);
    auto dn = dijkstra(n-1+n);

    int q; cin >> q;

    while(q--){
        int i; cin >> i;
        i += n-1;
        int ans = max(d1[i],dn[i]);
        if(ans >= inf1) ans = -1;
        cout << ans << endl;
    }
}

int main()
{
    fastio;

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

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

    return 0;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9852 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Runtime error 64 ms 52468 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 4 ms 10076 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9816 KB Output is correct
5 Correct 3 ms 9820 KB Output is correct
6 Correct 2 ms 9820 KB Output is correct
7 Incorrect 2 ms 9816 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 4 ms 10076 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9816 KB Output is correct
5 Correct 3 ms 9820 KB Output is correct
6 Correct 2 ms 9820 KB Output is correct
7 Incorrect 2 ms 9816 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 4 ms 10076 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9816 KB Output is correct
5 Correct 3 ms 9820 KB Output is correct
6 Correct 2 ms 9820 KB Output is correct
7 Incorrect 2 ms 9816 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9852 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Runtime error 64 ms 52468 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -