Submission #1017983

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017983		NintsiChkhaidze	Last supper (IOI12_supper)	C++17	40 / 100	239 ms	63352 KiB

advisor

#include <bits/stdc++.h>
#include "advisor.h"
#define pb push_back
using namespace std;

const int MM = 2e6 + 5;

bool onn[MM];
vector <int> st[MM];


void ComputeAdvice(int *C, int N, int K, int M) {
	for (int i=N-1;i>=0;i--){
		st[C[i]].pb(i);
	}
	
	set <pair<int,int> > stt;
	for (int i=0;i<K;i++){
		onn[i] = 1;
		int val = 0;
		if (!st[i].size()) val=1e9;
		else val=st[i].back();
		stt.insert({val,i});
	}
	
	int i;
	vector <int> vec;
	for (i = 0; i < N; i++) {
    	int req = C[i];
    	if (onn[req]) {
    		vec.pb(-1);
    		int val = 0;
			if (!st[req].size()) val=1e9;
			else val=st[req].back();
			stt.erase(stt.find({val,req}));
			
			while (st[req].size() && st[req].back() <= i){
    			st[req].pop_back();
			}
			val = 0;
			if (!st[req].size()) val=1e9;
			else val=st[req].back();
			stt.insert({val,req});
			continue;
		}
    	
		int idx=(--stt.end())->second; stt.erase(--stt.end());
		vec.pb(idx);
		onn[idx] = 0;
		onn[req] = 1;
		
		while (st[req].size() && st[req].back() <= i){
    		st[req].pop_back();
		}
		
		int val = 0;
		if (!st[req].size()) val=1e9;
		else val=st[req].back();
		stt.insert({val,req});
  	}
  	
  	int BL = sqrt(N);
	int bt1 = max(log2(N/BL),log2(N/BL));
	
	int bt2 = log2(N);
	int total1 = 2*N * bt1;
	int total2 = N * bt2;
	
	int tp = 0,bt;
  	if (total2 <= total1) {
  		bt = bt2;
  		tp=2;
	} 
  	else {
  		bt = bt1;
  		tp=1;
	  }
  	
  	for (int x: vec){
  		if (x==-1) continue;
  		if (tp == 2){
  			for (int j = bt; j >= 0; j--){
				if (((x >> j) & 1)) WriteAdvice(1);
				else WriteAdvice(0);
			}
			continue;
		}
		
		int blID = x / BL;
		
		for (int j = bt; j >= 0; j--){
			if (((blID >> j) & 1)) WriteAdvice(1);
			else WriteAdvice(0);
		}
		
		int iID = x - blID * BL;
		for (int j = bt; j >= 0; j--){
			if (((iID >> j) & 1)) WriteAdvice(1);
			else WriteAdvice(0);
		}
	}
	
}

assistant

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

int CC[2000005];
bool on[2000005];



void Assist(unsigned char *A, int N, int K, int R) {
	int BL = sqrt(N);
	int bt1 = max(log2(N/BL),log2(N/BL));
	
	int bt2 = log2(N);
	int total1 = 2*N * bt1;
	int total2 = N * bt2;
	
	int tp = 0,bt;
  	if (total2 <= total1) {
  		bt = bt2;
  		tp=2;
	} 
  	else {
  		bt = bt1;
  		tp=1;
	  }
	
	int id=0;
	for (int i = 0; i < R; i += bt + 1){
		for (int j = i; j <= i + bt; j++){
			if (A[j] == 1) CC[id] |= (1<<(bt-(j-i)));
		}
		id+=1;
	}
	for (int i=0;i<K;i++) on[i] = 1;
	
	int i;
	int l = 0;
	for (i = 0; i < N; i++) {
    	int req = GetRequest();
    	if (on[req]) {
			continue;
		}
		int idx;
		if (tp==1){
			int blID = CC[l++];
    		int iID = CC[l++];
    		idx = blID * BL + iID;
		}else{
			idx = CC[l++];
		}
    	
    	PutBack(idx);
		on[idx] = 0;
		on[req] = 1;
  	}
}

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 0 / 35
• Subtask 5: 14 / 39