Submission #550823

#	Time	Username	Problem	Language	Result	Execution time	Memory
550823		David_M	Robots (IOI13_robots)	C++14	0 / 100	1 ms	312 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>
using namespace std;
#define all(x) (x).begin(), (x).end()
#define pb push_back

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
    int ans=-1;
    vector<array<int, 3>> p(T);
    for (int i=0; i<T; i++)p[i]={W[i]+1, S[i]+1, i};
    sort(all(p));
    sort(X, X+A);
    sort(Y, Y+B);

    int l=1, r=T+1;
    while(l<=r){
        int m=l+r>>1;
        int M=0, k=0, o=0;
        vector<bool> f(T,0);
        vector<int> v;
        set<array<int, 2>> s;
        for (auto[x,y,i] : p){
            M=m;
            if(x>X[k]){
                while(s.size() && M--){
                    f[(*s.begin())[1]]=1;
                    s.erase(s.begin());
                }
                while(k<=A && x>X[k])k++;
                if(k==A+1)break;
            }
            s.insert({-y,i});
        }
        for (int i=0; i<T; i++)
            if(!f[i])v.pb(S[i]+1);
        k=M=0;
        for (auto y : v){
            while(k<=B && y>Y[k])k++,M=0;
            if(k==B+1){o=1;break;}
            M++;
            if(M==m)k++,M=0;
            if(k==B+1){o=1;break;}
        }
        if(o)l=m+1; else ans=m, r=m-1;
    }
    return ans;
}

Compilation message (stderr)

robots.cpp: In function 'int putaway(int, int, int, int*, int*, int*, int*)':
robots.cpp:17:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |         int m=l+r>>1;
      |               ~^~
robots.cpp:22:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   22 |         for (auto[x,y,i] : p){
      |                  ^

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 25
• Subtask 4: 0 / 37
• Subtask 5: 0 / 10