Submission #574909

#	Time	Username	Problem	Language	Result	Execution time	Memory
574909		FatihSolak	Last supper (IOI12_supper)	C++17	0 / 100	145 ms	11392 KiB

advisor

#include "advisor.h"
#include <bits/stdc++.h>
using namespace std;
void ComputeAdvice(int *c, int n, int k, int m){
    vector<int> occ[n];
    for(int i = n-1;i>=0;i--){
        occ[c[i]].push_back(i);
    }
    for(int i = 0;i<k;i++){
        WriteAdvice(occ[i].empty());
    }
    for(int i = 0;i<n;i++){
        occ[c[i]].pop_back();
        WriteAdvice(occ[c[i]].empty());
    }
}

assistant

#include "assistant.h"
#include <bits/stdc++.h>
using namespace std;
struct BIT{
    vector<int> bit;
    int n;
    BIT(int size){
        n = size+5;
        bit.assign(n,0);
    }
    void upd(int pos,int val){
        for(++pos;pos < n;pos += pos & -pos){
            bit[pos] += val;
        }
    }
    int get(int pos){
        int ret = 0;
        for(++pos;pos > 0;pos -= pos & -pos){
            ret += bit[pos];
        }
        return ret;
    }
    int get(int l,int r){
        return get(r) - get(l-1);
    }
    int get_kth(int k){
        int pos = 0;
        for(int i = 20;i>=0;i--){
            if( pos + (1<<i) < n && bit[pos + (1<<i)] < k){
                k -= bit[pos + (1<<i)];
                pos += (1<<i);
            }
        }
        return pos;
    }
};
void Assist(unsigned char *a, int n, int k, int r) {
    srand(time(NULL));
    set<int> s,now;
    BIT bt(n);
    int last = 0;
    for(int i = 0;i<k;i++){
        if(a[last++] == 1){
            s.insert(i);
        }
        now.insert(i);
        bt.upd(i,1);
    }
    assert(k > 3);
    for (int i = 0; i < n; i++) {
        int req = GetRequest();
        if(now.count(req) == 0){
            int num = bt.get_kth(rand()%k + 1);
            if(s.size()){
                num = *s.begin();
                s.erase(s.begin());
            }
            now.erase(num);
            bt.upd(num,-1);
            PutBack(num);
            now.insert(req);
            bt.upd(req,1);
        }
        if(a[last++] == 1){
            s.insert(req);
        }
    }

}

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