Submission #829942

#	Time	Username	Problem	Language	Result	Execution time	Memory
829942		Blagoj	Last supper (IOI12_supper)	C++17	39 / 100	2559 ms	20868 KiB

advisor

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

using namespace std;

void ComputeAdvice(int *C, int N, int K, int M) {
    queue<int> toDelete;
	unordered_map<int, int> cnt;
	set<int> s[N + 2];
	int Last[N + 2];
	for (int i = 0; i < N; i++) {
		cnt[C[i]]++;
		s[C[i]].insert(i + K);
	}
	for (int i = 0; i < K; i++) {
		Last[i] = i;
		if (!cnt[i]) toDelete.push(i);
	}
	vector<int> op(N + K);
	unordered_set<int> have;
	for (int i = 0; i < K; i++) {
		have.insert(i);
		if (!cnt[i]) op[i] = 1;
	}
	for (int i = 0; i < N; i++) {
		Last[C[i]] = i + K;
		if (have.count(C[i])) {
			cnt[C[i]]--;
			if (!cnt[C[i]]) {
				toDelete.push(C[i]);
				op[i + K] = 1;
			}
		}
		else {
			if (toDelete.size() == 0) {
				int last, position = -1;
				for (int x : have) {
					int temp = *s[x].lower_bound(i); 
					if (temp > position) {
						position = temp;
						last = x;
					}
				}
				toDelete.push(last);
				op[Last[last]] = 1;
			}
			int fr = toDelete.front();
			toDelete.pop();
			have.erase(fr);
			have.insert(C[i]);
			cnt[C[i]]--;
			if (!cnt[C[i]]) {
				toDelete.push(C[i]);
				op[i + K] = 1;
			}
		}
	}
	for (int i = 0; i < op.size(); i++) {
		WriteAdvice(op[i]);
	}
}

assistant

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

using namespace std;

void Assist(unsigned char *A, int N, int K, int R) {
    queue<int> toDelete;
	unordered_set<int> have;
	for (int i = 0; i < K; i++) {
		if (A[i] == 1) toDelete.push(i);
		have.insert(i);
	}
	for (int i = 0; i < N; i++) {
        int req = GetRequest();
		if (!have.count(req)) {
			PutBack(toDelete.front());
			have.erase(toDelete.front());
			toDelete.pop();
			have.insert(req);
		}
        if (A[i + K] == 1) {
			toDelete.push(req);
		}
	}
}

Compilation message (stderr)

advisor.cpp: In function 'void ComputeAdvice(int*, int, int, int)':
advisor.cpp:58:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |  for (int i = 0; i < op.size(); i++) {
      |                  ~~^~~~~~~~~~~

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