Submission #208558

#	Time	Username	Problem	Language	Result	Execution time	Memory
208558		teomrn	Cave (IOI13_cave)	C++14	Compilation error	0 ms	0 KiB

cave

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

int tryCombination(int S[]);
void answer(int S[], int D[]);

#define local1
#ifdef local

int _n;
int _ans[1000];
int _coresp[1000]; /// coresp[i] = ce actioneaza fiecare switch

int tryCombination(int S[])
{
	int best = 1e9;
	for (int i = 0; i < _n; i++)
		if (S[i] != _ans[i])
			best = min(best, _coresp[i]);

	return (best == 1e9 ? -1 : best);
}

void answer(int S[], int D[])
{
	for (int i = 0; i < _n; i++) {
		if (S[i] != _ans[i])
			cerr << "Bad for i = " << i << " and S\n";
		if (D[i] != _coresp[i])
			cerr << "Bad for i = " << i << " and D\n";
	}
}

#endif

void exploreCave(int N)
{
	vector <int> switches(N);
	iota(switches.begin(), switches.end(), 0);
	vector <int> ans(N), coresp(N);
	vector <int> question(N);

	for (int door = 0; door < N; door++) {
		// vreau sa deschid usa door
		int value = 0;
		for (auto i : switches)
			question[i] = 0;
		int guess = tryCombination(question.data());
		
		if (guess <= door && guess != -1)
			value = 1; /// usa o sa se deschida cu switch-ul pe 1

		int p = -1;

		for (int q = (1 << 20); q; q /= 2) {
			if (p + q < switches.size() - 1) {
				int val = p + q;
				for (int i = 0; i <= val; i++)
					question[switches[i]] = 1 - value;
				for (int i = val + 1; i < (int)switches.size(); i++)
					question[switches[i]] = value;
				int guess = tryCombination(question.data());
				for (auto i : question)
					cerr << i << ' ';

				if (guess > door || guess == -1)
					p += q;
			}
		}

		p = switches[p + 1];
		/// usa door este actionata de switch-ul p
	
		coresp[p] = door;
		ans[p] = value;
		question[p] = value;

		switches.erase(find(switches.begin(), switches.end(), p));
	}

	answer(ans.data(), coresp.data());
}

#ifdef local

int main()
{
	ifstream cin("input.in");
	cin >> _n;
	for (int i = 0; i < _n; i++)
		cin >> _ans[i];
	for (int i = 0; i < _n; i++)
		cin >> _coresp[i];

	exploreCave(_n);
	return 0;
}

#endif

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:56:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (p + q < switches.size() - 1) {
        ~~~~~~^~~~~~~~~~~~~~~~~~~~~
/tmp/ccwM7uhq.o: In function `main':
grader.c:(.text.startup+0xc): undefined reference to `exploreCave'
/tmp/cc0B1Q7G.o: In function `exploreCave(int)':
cave.cpp:(.text+0x198): undefined reference to `tryCombination(int*)'
cave.cpp:(.text+0x295): undefined reference to `tryCombination(int*)'
cave.cpp:(.text+0x42f): undefined reference to `answer(int*, int*)'
cave.cpp:(.text+0x527): undefined reference to `answer(int*, int*)'
collect2: error: ld returned 1 exit status