Submission #815674

#	Time	Username	Problem	Language	Result	Execution time	Memory
815674		Ozy	Circle selection (APIO18_circle_selection)	C++17	0 / 100	688 ms	1048576 KiB

circle_selection

#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define debug(a) cout << #a <<  " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#define rep(i,a,b) for(int i = (a); i <= (b); i++)
#define repa(i,a,b) for(int i = (a); i >= (b); i--)
#define pll pair<lli,lli> 

#define INF (1ll<<60)
#define MAX 300000
#define largo 2000000000
//para el vector de orden
#define id second

struct xx {
    lli x;
    lli y;
    lli r;
};

struct yy {
    lli MIN;
    lli hizq;
    lli hder;
};

lli n,cont;
lli res[MAX+2],new_order[MAX+2];
xx circulo[MAX+2];
vector<pll> orden;
vector<yy> stree;
yy trash;

bool push(lli pos) {
    if (stree[pos].hizq != 0) return true;

    lli a = stree.size();
    stree.push_back(trash);
    stree.push_back(trash);

    stree[pos].hizq = a;
    stree[pos].hder = a+1;
    return false;
}

lli query(lli pos, lli ini, lli fin, lli l, lli r) {

    if (ini > r || fin < l) return 0;
    if (l <= ini && fin <= r) return stree[pos].MIN;

    lli mitad = (ini+fin)/2;

    push(pos);
    lli a = query(stree[pos].hizq, ini,mitad,l,r);
    lli b = query(stree[pos].hder, mitad+1,fin,l,r);
    
    if (new_order[a] < new_order[b]) return a;
    else return b;
}

void update(lli pos, lli ini, lli fin, lli l, lli r, lli val) {

    if (ini > r || fin < l) return;
    if (l <= ini && fin <= r) {
        stree[pos].MIN = val;
        return;
    }

    lli mitad = (ini+fin)/2;

    push(pos);
    update(stree[pos].hizq, ini,mitad,l,r,val);
    update(stree[pos].hder, mitad+1,fin,l,r,val);

    if (new_order[stree[ stree[pos].hizq ].MIN] < new_order[stree[ stree[pos].hder ].MIN]) stree[pos].MIN = stree[ stree[pos].hizq ].MIN;
    else stree[pos].MIN = stree[ stree[pos].hizq ].MIN;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    rep(i,1,n) {
        cin >> circulo[i].x >> circulo[i].y >> circulo[i].r;
        orden.push_back({-circulo[i].r, i});
    }
    sort(orden.begin(), orden.end());

    stree.push_back(trash);
    stree[0].MIN = INF;

    cont = 1;
    new_order[0] = INF;
    for (auto act : orden) {
        new_order[act.id] = cont++;

        lli l = circulo[act.id].x - circulo[act.id].r;
        lli r = circulo[act.id].x + circulo[act.id].r;
        lli a = query(0,-largo,largo,l,r);

        if (a == 0) { //meto mi rango
            res[act.id] = act.id;
            update(0,-largo,largo,l,r,act.id);
        }
        else res[act.id] = a;
    }

    rep(i,1,n) cout << res[i] << ' ';

    return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 12
• Subtask 3: 0 / 15
• Subtask 4: 0 / 23
• Subtask 5: 0 / 30
• Subtask 6: 0 / 13