Submission #1082191

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Source Code Expand

#include <stdio.h>
#include <algorithm>

using namespace std;

const int maxn = 120000;
int n;
int a[maxn] , f[maxn];
int first , last , tot;
void work () {
	int i;
	scanf ( "%d" , &n );
	for ( i = 1 ; i <= n ; i++ ) {
		scanf ( "%d" , &a[i] );
		f[a[i]]++;
	}
	tot = 0;
	first = 9999999;
	for ( i = 1 ; i <= 100000 ; i++ ) if ( f[i] >= 2 ) {
		tot += f[i] - 1;
		first = min ( first , i );
		last = i;
	}
	if ( tot == 0 ) {
		printf ( "%d\n" , n );
		return ;
	}
	if ( tot == 1 ) {
		printf ( "%d\n" , n - 2 );
		return ;
	}
	if ( tot % 2 == 0 ) {
		printf ( "%d\n" , n - tot );
	}
	else {
		printf ( "%d\n" , n - tot - 1 );
	}
}
int main () {
	work ();
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘void work()’:
./Main.cpp:12:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf ( "%d" , &n );
                     ^
./Main.cpp:14:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf ( "%d" , &a[i] );
                         ^

Judge Result