Submission #153574

#	Time	Username	Problem	Language	Result	Execution time	Memory
153574		asifthegreat	Arranging Shoes (IOI19_shoes)	C++14	0 / 100	2 ms	256 KiB

shoes

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

long long count_swaps(std::vector<int> s) {
	int cnt = 0;
	int sz = s.size();
	for(int i = 0; i < s.size();i++){
		if(i < sz/2)s[i] = -(i+1);
		else s[i] = (i+1-sz/2);
	}
	for(int i = 0; i < sz;i++){
		cout << s[i] << " ";
	}cout << endl;
	for(int i = 0; i < s.size();i++){
		for(int j = i+1; j < s.size();j++){
			if(s[i] == -s[j]){
				for(int p = j;p > i+1;p--){
					swap(s[p],s[p-1]);
					cnt++;
				}
				if(i%2==0 and s[i] > 0)swap(s[i],s[i+1]),cnt++;
				i++;
			}
		}
	}
	return cnt;
}

// int main() {
// 	int n;
// 	scanf("%d", &n);
// 	vector<int> S(2 * n);
// 	for(int i = 0; i < 2 * n; i++)
// 		scanf("%d", &S[i]);
// 	long long result = count_swaps(S);
// 	printf("%lld\n", result);
// 	return 0;
// }

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:9:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < s.size();i++){
                 ~~^~~~~~~~~~
shoes.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < s.size();i++){
                 ~~^~~~~~~~~~
shoes.cpp:17:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j = i+1; j < s.size();j++){
                    ~~^~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15