Submission #1101781

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101781		alexander707070	Robots (IOI13_robots)	C++14	100 / 100	1654 ms	46316 KiB

robots

#include<bits/stdc++.h>
#include "robots.h"
 
#define MAXN 1000007
using namespace std;
 
struct edge{
    int to;
    bool cap;
    int rev;
};
 
struct toy{
    int x,y,id;

    inline friend bool operator < (toy fr,toy sc){
        return fr.y<sc.y;
    }
};
 
int n,m,k,maxb;
int x[MAXN],y[MAXN];
toy s[MAXN],t[MAXN];
bool is[MAXN];

priority_queue<toy> q;
 
bool cmp(toy fr,toy sc){
    return fr.x<sc.x;
}
 
bool cmp2(toy fr,toy sc){
    return fr.y<sc.y;
}
 
bool check(int days){
    while(!q.empty())q.pop();
    for(int i=1;i<=k;i++)is[i]=false;

    int pt=1;
    for(int i=1;i<=n;i++){
        while(pt<=k and x[i]>s[pt].x){
            q.push(s[pt]); pt++;
        }

        for(int f=1;f<=days and !q.empty();f++)q.pop();
    }

    while(pt<=k){
        q.push(s[pt]); pt++;
    }

    while(!q.empty()){
        is[q.top().id]=true;
        q.pop();
    }

    pt=m;
    int br=days;
    for(int i=k;i>=1;i--){
        if(!is[t[i].id])continue;

        if(br==0){
            br=days; pt--;
        }

        if(y[pt]<=t[i].y)return false;
        br--;
    }

    return true;
}
 
int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
//int putaway(int A, int B, int T, vector<int> X, vector<int> Y, vector<int> W, vector<int> S) {
    n=A; m=B; k=T;
 
    for(int i=1;i<=n;i++)x[i]=X[i-1];

    for(int i=1;i<=m;i++){
        y[i]=Y[i-1];
        maxb=max(maxb,y[i]);
    }
    for(int i=1;i<=k;i++)s[i]=t[i]={W[i-1],S[i-1],i};
 
    sort(x+1,x+n+1);
    sort(y+1,y+m+1);
 
    sort(s+1,s+k+1,cmp);
    sort(t+1,t+k+1,cmp2);
 
    if(x[n]<=s[k].x and y[m]<=s[k].y)return -1;
    if(x[n]<=t[k].x and y[m]<=t[k].y)return -1;

    int l=0,r=k+1,tt;
    while(l+1<r){
        tt=(l+r)/2;
 
        if(check(tt))r=tt;
        else l=tt;
    }
 
    return r;
}
 
 
/*int main(){
 
    cout<<putaway(3,2,10,{6,2,9},{4,7},{4,8,2,7,1,5,3,8,7,10},{6,5,3,9,8,1,3,7,6,5})<<"\n";
 
	return 0;
}*/

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