Submission #123866

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
123866	2019-07-02T08:15:26 Z	임유진(#3031)	Meetings (JOI19_meetings)	C++14	Compilation error	0 ms	0 KB

meetings

#include "meetings.h"
#include<vector>

using namespace std;

void f(vector<int> &v) {
	if(v.size() == 1) return;
	if(v.size() == 2) {
		Bridge(min(v[0], v[1]), max(v[0], v[1]));
		return;
	}

	/*
	printf("f(");
	for(auto a : v) printf("%d ", a);
	printf(")\n");
	*/

	random_shuffle(v.begin(), v.end());

	int alpha = v[0], beta = v[1];
	vector<int> X, Y;
	X.push_back(alpha);
	Y.push_back(beta);
	for(int i = 2; i < v.size(); i++) {
		if(v[i] == beta) {
			Y.push_back(v[i]);
			continue;
		}
		int t = Query(alpha, beta, v[i]);
		if(t != alpha && t != beta) beta = t;
		if(t == alpha) X.push_back(v[i]);
		else Y.push_back(v[i]);
	}
	Bridge(min(alpha, beta), max(alpha, beta));
	f(X);
	f(Y);
}

void Solve(int N) {
	vector<int> v(N);
	for(int i = 0; i < N; i++) v[i] = i;
	f(v);
}

Compilation message

meetings.cpp: In function 'void f(std::vector<int>&)':
meetings.cpp:19:2: error: 'random_shuffle' was not declared in this scope
  random_shuffle(v.begin(), v.end());
  ^~~~~~~~~~~~~~
meetings.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 2; i < v.size(); i++) {
                 ~~^~~~~~~~~~