Submission #143580

#	Time	Username	Problem	Language	Result	Execution time	Memory
143580		cfalas	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	30 ms	1912 KiB

shoes

#include "shoes.h"

long long count_swaps(std::vector<int> s) {
	int ans=0;
	for(int i=0;i<s.size()/2;i++){
		if(s[i]<0 && i%2==1 || s[i]>0 && i%2==0) ans++;
	}
	return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:5:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.size()/2;i++){
              ~^~~~~~~~~~~
shoes.cpp:6:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(s[i]<0 && i%2==1 || s[i]>0 && i%2==0) ans++;

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