Submission #250240

#	Time	Username	Problem	Language	Result	Execution time	Memory
250240		MarcoMeijer	Robots (IOI13_robots)	C++14	100 / 100	2020 ms	26764 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>
using namespace std;

//macros
typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define INF 1e9
#define pb push_back
#define fi first
#define se second
#define sz size()

const int MX=1e6+1e5;

int a, b, t;
int x[MX], y[MX], w[MX], s[MX];
int SA[MX];

bool possible(int T) {
    int n=0;
    priority_queue<int> pq;
    RE(i,a) {
        while(n != t && w[SA[n]] < x[i]) {
            pq.push(s[SA[n++]]);
        }
        RE(j,T) {
            if(pq.empty()) break;
            pq.pop();
        }
    }
    while(n != t) {
        pq.push(s[SA[n++]]);
    }
    RE(i,b) {
        RE(j,T) {
            if(pq.empty()) return 1;
            if(pq.top() >= y[i]) return 0;
            pq.pop();
        }
    }
    return pq.empty();
}

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
    a=A; b=B; t=T;
    RE(i,A) x[i]=X[i];
    RE(i,B) y[i]=Y[i];
    RE(i,T) w[i]=W[i], s[i]=S[i];

    RE(i,t) SA[i]=i;
    sort(SA,SA+t, [](int i, int j) {
        return w[i]<w[j];
    });
    sort(x,x+a);
    sort(y,y+b,greater<int>());

    int lb=0, ub=T;
    while(lb != ub) {
        int mid=(lb+ub)/2;
        if(possible(mid)) ub=mid;
        else lb=mid+1;
    }

    if(!possible(lb)) lb=-1;

    return lb;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37
• Subtask 5: 10 / 10