Submission #638740

#	Time	Username	Problem	Language	Result	Execution time	Memory
638740		zaneyu	Robots (IOI13_robots)	C++14	100 / 100	1589 ms	24872 KiB

robots

#include "robots.h"
#include<bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<long long,null_type,less_equal<long long>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
//order_of_key #of elements less than x
// find_by_order kth element
using ll=long long;
using ld=long double;
using pii=pair<int,int>;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()),c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define GET(v,x) lower_bound(ALL(v),x)-v.begin()
const int maxn=5e4+5;
const int INF=0x3f3f3f3f;
const int MOD=998244353;
const ld PI=acos(-1.0l);
const ld eps=1e-6;
const ll INF64=9e18+1;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
int a,b,t,x[maxn],y[maxn];
vector<pii> v;
bool wk(int mid){
    int p=0;
    priority_queue<int> pq;
    REP(i,a){
        while(p<t and v[p].f<x[i]){
            pq.push(v[p].s);
            ++p;
        }
        int z=mid;
        while(z-- and sz(pq)){
            pq.pop();
        }
    }
    while(p<t) pq.push(v[p++].s);
    for(int i=b-1;i>=0;i--){
        int z=mid;
        while(z-- and sz(pq) and pq.top()<y[i]){
            pq.pop();
        }
    }
    return !sz(pq);
}   
int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
    a=A,b=B,t=T;
    REP(i,T) v.pb({W[i],S[i]});
    sort(ALL(v));
    REP(i,A) x[i]=X[i];
    REP(i,B) y[i]=Y[i];
    sort(x,x+a),sort(y,y+b);
    int l=1,r=T;
    while(l<r){
        int mid=(l+r)/2;
        if(wk(mid)) r=mid;
        else l=mid+1;
    }
    if(!wk(l)) return -1;
    return l;
}

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