Submission #544268

#	Time	Username	Problem	Language	Result	Execution time	Memory
544268		krit3379	Robots (IOI13_robots)	C++14	100 / 100	1761 ms	26468 KiB

robots

#include<bits/stdc++.h>
using namespace std;
#include "robots.h"
#define N 1000005

struct A{
    int w,s;
    bool operator<(const A& o)const{
        return s<o.s;
    }
};

bool comw(A a,A b){
    return a.w<b.w;
}

vector<A> p;
priority_queue<A> q;

int putaway(int a,int b,int t,int *x,int *y,int *w,int *s){
    int i,l,r,mid,now,cnt,ans;
    sort(x,x+a);
    sort(y,y+b);
    for(i=0;i<t;i++){
        if(w[i]>=x[a-1]&&s[i]>=y[b-1])return -1;
        p.push_back({w[i],s[i]});
    }
    sort(p.begin(),p.end(),comw);
    l=1,r=t;
    while(l<=r){
        mid=(l+r)/2;
        now=0;
        for(i=0;i<a;i++){
            while(now<t&&p[now].w<x[i])q.push(p[now++]);
            cnt=mid;
            while(cnt--&&!q.empty())q.pop();
        }
        while(now<t)q.push(p[now++]);
        for(i=b-1;i>=0;i--){
            cnt=mid;
            while(cnt--&&!q.empty()&&q.top().s<y[i])q.pop();
        }
        if(q.empty())ans=mid,r=mid-1;
        else l=mid+1;
        while(!q.empty())q.pop();
    }
    return ans;
}

Compilation message (stderr)

robots.cpp: In function 'int putaway(int, int, int, int*, int*, int*, int*)':
robots.cpp:21:27: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   21 |     int i,l,r,mid,now,cnt,ans;
      |                           ^~~

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