Submission #58456

#	Time	Username	Problem	Language	Result	Execution time	Memory
58456		kingpig9	Last supper (IOI12_supper)	C++11	0 / 100	236 ms	27736 KiB

advisor

#include <bits/stdc++.h>
#include "advisor.h"

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
static const int MAXN = 1e5 + 10;

//#define debug(...) fprintf(stderr, __VA_ARGS__)
#define debug(...)
#define fi first
#define se second
#define all(v) (v).begin(), (v).end()
#define fillchar(a, s) memset((a), (s), sizeof(a))

#warning static (advisor)

static int *C, N, K, M;
static set<pii> st;	//pii(when we neet i, i) -- you remove GREATEST of them.
static bool has[MAXN];
static vector<int> inds[MAXN];

static vector<int> getans() {
	//let's just implement -- get the bits
	//+ 10 just for the adjustment. Makes no difference for max values of N, K.

	for (int i = 0; i < N; i++) {
		inds[i].push_back(N);
	}
	for (int i = N - 1; i >= 0; i--) {
		inds[C[i]].push_back(i);
	}

	for (int i = 0; i < K; i++) {
		has[i] = true;
		st.emplace(inds[i].back(), i);
	}

	vector<int> ans;
	for (int i = 0; i < N; i++) {
		if (has[C[i]]) {
			st.erase(pii(inds[C[i]].back(), C[i]));
			inds[C[i]].pop_back();
			st.insert(pii(inds[C[i]].back(), C[i]));
			ans.push_back(N);	//this is bad
			debug("Bad\n");
			continue;
		}

		//remove one
		inds[C[i]].pop_back();
		auto it = --st.end();
		pii tp = *it;
		st.erase(it);
		has[tp.se] = false;
		debug("tp.se = %d\n", tp.se);
		ans.push_back(tp.se);
		st.insert(pii(inds[C[i]].back(), C[i]));

		//add C[i]
		has[C[i]] = true;
	}
	return ans;
}

static void go() {
	vector<int> ans = getans();
	vector<vector<int>> rpos(N + 1, vector<int> ());
	for (int i = 0; i < ans.size(); i++) {
		rpos[ans[i]].push_back(i);
	}

	//will it be removed before it's used?
	vector<int> firstrem(N + 1, N);
	vector<int> lastuse(N + 1, N);
	for (int i = 0; i < N; i++) {
		if (ans[i] != N) {
			firstrem[ans[i]] = i;
		}
		lastuse[C[i]] = i;
	}
	for (int i = 0; i < K; i++) {
		WriteAdvice(lastuse[i] == N || firstrem[i] > lastuse[i]);
	}
	for (int i = 0; i < N; i++) {
		//what do you remove? ans[i].
		//what do you replace it with? C[i].
		//is it going to be removed before it's used again?
		if (ans[i] == N) {
			WriteAdvice(1);	//good
		} else {
			if (i != lastuse[C[i]]) {
				auto it = upper_bound(all(rpos[C[i]]), i);
				if (it != rpos[C[i]].end() && *it < lastuse[C[i]]) {
					//yes it will be removed
					WriteAdvice(0);
				} else {
					WriteAdvice(1);
				}
			} else {
				WriteAdvice(1);
			}
		}
	}
}

void ComputeAdvice (int *ccc, int nnn, int kkk, int mmm) {
	C = ccc;
	N = nnn;
	K = kkk;
	M = mmm;
	go();
}

assistant

#include <bits/stdc++.h>
#include "assistant.h"

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
static const int MAXN = 1e5 + 10;

#define debug(...) fprintf(stderr, __VA_ARGS__)
//#define debug(...)
#define fi first
#define se second
#define all(v) (v).begin(), (v).end()
#define fillchar(a, s) memset((a), (s), sizeof(a))

#warning static (assistant)

static unsigned char *A;
static int N, K;
static int cur[MAXN];
static bool has[MAXN];

static void go() {
	priority_queue<pii> pq;
	for (int i = 0; i < K; i++) {
		cur[i] = i;
		has[i] = true;
		pq.emplace(A[i], i);
	}
	A += K;

	for (int i = 0; i < N; i++) {
		//replace it with this
		int req = GetRequest();
		if (has[req]) {
			continue;
		}
		int ind = pq.top().se;
		int &ref = cur[ind];
		//debug("REF %d\n", ref);
		PutBack(ref);
		has[ref] = false;
		pq.pop();
		ref = req;
		pq.emplace(A[i], ind);
		has[req] = true;
	}
}

void Assist (unsigned char *aaa, int nnn, int kkk, int rrr) {
	A = aaa;
	N = nnn;
	K = kkk;
	go();
}

Compilation message (stderr)

advisor.cpp:17:2: warning: #warning static (advisor) [-Wcpp]
 #warning static (advisor)
  ^~~~~~~
advisor.cpp: In function 'void go()':
advisor.cpp:70:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < ans.size(); i++) {
                  ~~^~~~~~~~~~~~

assistant.cpp:17:2: warning: #warning static (assistant) [-Wcpp]
 #warning static (assistant)
  ^~~~~~~

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