Submission #764563

#	Time	Username	Problem	Language	Result	Execution time	Memory
764563		pere_gil	Logičari (COCI21_logicari)	C++14	10 / 110	15 ms	1440 KiB

Main

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

#define ll long long
#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) a*b/gcd(a,b)
#define ii pair<int,int>
#define vi vector<int>
#define all(x) x.begin(),x.end()

int main(){
	int n; scanf("%d",&n);
	int u,v; 
	for(int i=0;i<n;i++) scanf("%d %d",&u,&v);

	if(n==2) printf("2\n");
	else if(n%4) printf("-1\n");
	else printf("%d\n",n/2);
	
	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  int n; scanf("%d",&n);
      |         ~~~~~^~~~~~~~~
Main.cpp:14:28: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  for(int i=0;i<n;i++) scanf("%d %d",&u,&v);
      |                       ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 40
• Subtask 4: 0 / 50