Submission #1024429

#	Time	Username	Problem	Language	Result	Execution time	Memory
1024429		socpite	Last supper (IOI12_supper)	C++17	100 / 100	65 ms	8284 KiB

advisor

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

void ComputeAdvice(int *C, int N, int K, int M) {
	vector<int> ans(N+K, 0), prv(N, N), next(N), active(N, 0);
	set<pair<int, int>> st;
	for(int i = N-1; i >= 0; i--){
		next[i] = prv[C[i]];
		// cout << C[i] << " " << next[i] << endl;
		prv[C[i]] = i;
	}
	for(int i = 0; i < K; i++){
		active[i] = 1;
		st.insert({prv[i], i});
		prv[i] = i;
	}
	for(int i = 0; i < N; i++){
		if(active[C[i]]){
			ans[prv[C[i]]] = 1;
			st.erase(make_pair(i, C[i]));
			st.insert({next[i], C[i]});
		}
		else{
			auto tmp = *st.rbegin();
			active[tmp.second] = 0;
			active[C[i]] = 1;
			st.erase(tmp);
			st.insert({next[i], C[i]});
		}
		prv[C[i]] = i+K;
	}
	for(auto v: ans)WriteAdvice(v);
}

assistant

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

void Assist(unsigned char *A, int N, int K, int R) {
	vector<int> bad;
	vector<int> active(N, 0);
	vector<int> prv(N, -1);
	for(int i = 0; i < K; i++){
		active[i] = 1;
		if(!A[i])bad.push_back(i);
		prv[i] = i;
	}
	for(int i = 0; i < N; i++){
		int x = GetRequest();
		if(!active[x]){
			if(prv[x] != -1)assert(!A[prv[x]]);
			active[bad.back()] = 0;
			active[x] = 1;
			PutBack(bad.back());
			bad.pop_back();
		}
		if(!A[i+K])bad.push_back(x);
		prv[x] = i+K;
	}

}

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