Submission #211063

#	Time	Username	Problem	Language	Result	Execution time	Memory
211063		lyh	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

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

long long count_swaps(vector<int> S) {
	// long long count_swaps() {
	long long sum= 0;
	for(int i= 0; i < 2 * n; i+= 2) {
		int k;
		for(k= i; k < 2 * n; k++) {
			if(S[k] > 0) break;
		}
		for(int j= k; j > i; j--) {
			swap(S[j], S[j - 1]);
			sum++;
		}
		for(k= i + 1; k < 2 * n; k++) {
			if(S[k] == -S[i]) {
				break;
			}
		}
		for(int j= k; j > i + 1; j--) {
			swap(S[j], S[j - 1]);
			sum++;
		}
	}
	return sum;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:8:24: error: 'n' was not declared in this scope
  for(int i= 0; i < 2 * n; i+= 2) {
                        ^