Submission #1109930

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109930		KasymK	Nile (IOI24_nile)	C++17	0 / 100	38 ms	6084 KiB

nile

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 1e5+5;
int rep[N], sz[N], n, answer;

void init(){
    for(int i = 0; i < n; ++i)
        rep[i] = i, sz[i] = 1;
    answer = 2*n;
}

int find(int x){
    if(rep[x]==x)
        return x;
    return rep[x]=find(rep[x]);
}

void merge(int a, int b){
    a = find(a), b = find(b);
    if(sz[a]<sz[b])
        swap(a, b);
    sz[a] += sz[b];
    rep[b] = a;
    if(sz[a]&1 and sz[b]&1)
        answer -= 2;
}

vector<ll> calculate_costs(vector<int> W, vector<int> A, vector<int> B, vector<int> E){
    n = (int)W.size();
    vector<pii> v;
    for(int i = 0; i < n; ++i)
        v.pb({W[i], i});
    sort(all(v));
    vector<array<int, 3>> as;
    for(int i = 1; i < n; ++i)
        as.pb({v[i].ff-v[i-1].ff, v[i].ss, v[i-1].ss});
    sort(all(as));
    init();
    vector<pii> Q;
    for(int i = 0; i < (int)E.size(); ++i)
        Q.pb({E[i], i});
    vector<ll> ans((int)Q.size());
    int ii = 0;
    for(auto &d : Q){
        while(ii<(int)as.size() and as[ii][0]<=d.ff)
            merge(as[ii][1], as[ii][2]), ii++;
        ans[d.ss] = answer;
    }
    return ans;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 6
• Subtask 2: 0 / 13
• Subtask 3: 0 / 17
• Subtask 4: 0 / 11
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15
• Subtask 7: 0 / 18