Submission #251288

#	Time	Username	Problem	Language	Result	Execution time	Memory
251288		eohomegrownapps	Last supper (IOI12_supper)	C++14	0 / 100	45 ms	8176 KiB

advisor

#include "advisor.h"
#include <bits/stdc++.h>
using namespace std;
#include <bits/extc++.h>
using namespace __gnu_pbds;

template <typename T>
using pbds_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T, typename V>
using pbds_map = tree<T, V, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

void ComputeAdvice(int *c, int n, int k, int m) {
    vector<int> lastocc(n,-1);
    for (int i = 0; i<n; i++){
        lastocc[c[i]]=i;
    }
    int bitwidth = ceil(log2(k));
    set<pair<int,int>> scaffrem;
    pbds_set<int> scaff;
    for (int i = 0; i<k; i++){
        scaffrem.insert({lastocc[i],i});
        scaff.insert(i);
    }
    for (int i = 0; i<n; i++){
        if (scaff.find(c[i])!=scaff.end()){
            continue;
        } else {
            auto toremove = prev(scaffrem.end());
            //can we get rid of one we've already used
            auto it = scaffrem.lower_bound({i,-1});
            if (it!=scaffrem.begin()){
                toremove = prev(it);
            }
            int ind = scaff.order_of_key(toremove->second);
            //transmit ind
            for (int i = bitwidth-1; i>=0; i--){
                WriteAdvice((1<<i)&ind);
            }
            scaffrem.erase(toremove);
            scaff.erase(scaff.find_by_order(ind));
            scaffrem.insert({-lastocc[c[i]],c[i]});
            scaff.insert(c[i]);
        }
    }
}

assistant

#include "assistant.h"
#include <bits/stdc++.h>
using namespace std;
#include <bits/extc++.h>
using namespace __gnu_pbds;

template <typename T>
using pbds_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T, typename V>
using pbds_map = tree<T, V, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

void Assist(unsigned char *A, int n, int k, int r) {
    //GetRequest()
    //PutBack()
    int ptr = 0;
    int bitwidth = ceil(log2(k));
    pbds_set<int> scaff;
    for (int i = 0; i<k; i++){
        scaff.insert(i);
    }
    for (int i = 0; i<n; i++){
        int col = GetRequest();
        if (scaff.find(col)!=scaff.end()){
            continue;
        } else {
            int ind = 0;
            for (int i = 0; i<bitwidth; i++){
                ind*=2;
                ind+=A[ptr];
                ptr++;
            }
            auto putel = scaff.find_by_order(ind);
            PutBack(*putel);
            scaff.erase(putel);
            scaff.insert(col);
        }
    }
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 35
• Subtask 5: 0 / 39