Submission #744090

#	Time	Username	Problem	Language	Result	Execution time	Memory
744090		boyliguanhan	Last supper (IOI12_supper)	C++17	26 / 100	360 ms	21972 KiB

advisor

#include "advisor.h"
#include <map>
#include <vector>
#include <stack>
#include <algorithm>
#include <stdio.h>
using namespace std;
int where[1000005];
int Next[1000005];
vector < int > when[100005];
map < int , int > how;
void ComputeAdvice(int *C, int N, int K, int M) 
{
	int t=0,now=1,xx,i,j;
	while(now<K)
	{
		now*=2;
		t++;
	}
	
	for(i=0;i<N;i++) when[C[i]].push_back(i);
	for(i=0;i<N;i++) when[i].push_back(i+N);
	for(i=0;i<N;i++) Next[i]=*upper_bound(when[C[i]].begin(),when[C[i]].end(),i);
	for(i=0;i<K;i++) 
	{
		where[i]=i;
		how[when[i][0]]=i;
	}
	for(i=K;i<N;i++) where[i]=-1;
	for(i=0;i<N;i++)
	{
		if(how.find(i)!=how.end()) how.erase(i);
		if(where[C[i]]==-1)
		{
			xx=where[prev(how.end())->second];
			for(j=0;j<t;j++) 
			{
				if(xx&(1<<j)) WriteAdvice(1);
				else WriteAdvice(0);
			}
			where[C[i]]=xx;
			where[prev(how.end())->second]=-1;
			how.erase(prev(how.end()));
		} else {
          for(j = 0; j < t; j++)
            	if(K&(1<<j)) WriteAdvice(1);
          		else WriteAdvice(0);
        }
		how[Next[i]]=C[i]; 
	}
 
}

assistant

#include "assistant.h"
#include<bits/stdc++.h>
using namespace std;
void Assist(unsigned char *A, int N, int K, int R) {

  priority_queue<pair<int, int>> q;
  int last[N], nxt[N];
  memset(last, 1, sizeof last);
  int C[N], bits = log2(K)+1;
  memset(C, 0, sizeof C);
  for(int i = 0; i < N; i++)
    for(int j = 0; j < bits; j++)
      C[i]|=(int)A[i*bits+j] << j;
  int scaffold[K];
  iota(scaffold, scaffold+K, 0);
  for(int i = 0; i < N; i++) {
    int x = GetRequest();
    if(C[i]<K)
      PutBack(scaffold[C[i]]), scaffold[C[i]] = x;
  }
}

Compilation message (stderr)

assistant.cpp: In function 'void Assist(unsigned char*, int, int, int)':
assistant.cpp:8:16: warning: unused variable 'nxt' [-Wunused-variable]
    8 |   int last[N], nxt[N];
      |                ^~~

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