Submission #392218

#	Time	Username	Problem	Language	Result	Execution time	Memory
392218		cpp219	Robots (IOI13_robots)	C++14	100 / 100	2137 ms	37980 KiB

robots

#include<bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 300 + 9;
const ll mod = 1e9 + 7;
#include "robots.h"
vector<int>Wl[100000];
vector<int>Sl[100000];
int us[1000100];
int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[])
{
    sort(X,X+A);
    sort(Y,Y+B);
    int i;
    for(i=0;i<T;i++)
    {
        int x=upper_bound(X,X+A,W[i])-X;
        int y=upper_bound(Y,Y+B,S[i])-Y;
        if(x==A&&y==B)
        {
            return -1;
        }
        Wl[x].push_back(i);
        Sl[y].push_back(i);
    }
    int s=1;
    int e=T;
    while(s!=e)
    {
        int m=(s+e)/2;
        priority_queue<pair<int,int>>tc;
        memset(us,0,sizeof(us));
        int i;
        int c=0;
        for(i=0;i<A;i++)
        {
            int j;
            for(j=0;j<Wl[i].size();j++)
            {
                tc.push({S[Wl[i][j]],Wl[i][j]});
            }
            for(j=0;j<m;j++)
            {
                if(tc.empty())
                    break;
                auto a=tc.top();
                tc.pop();
                us[a.second]=1;
                c++;
            }

        }
        int cc=0;
        for(i=0;i<B;i++)
        {
            int j;
            for(j=0;j<Sl[i].size();j++)
            {
                if(!us[Sl[i][j]])
                {
                    cc++;
                }
            }
            if(cc>=m)
                c+=m;
            else
                c+=cc;
            cc=max(0,cc-m);
        }
        if(c!=T)
            s=m+1;
        else
            e=m;
    }
    return s;
}

Compilation message (stderr)

robots.cpp: In function 'int putaway(int, int, int, int*, int*, int*, int*)':
robots.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |             for(j=0;j<Wl[i].size();j++)
      |                     ~^~~~~~~~~~~~~
robots.cpp:61:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             for(j=0;j<Sl[i].size();j++)
      |                     ~^~~~~~~~~~~~~

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