Submission #9206

#TimeUsernameProblemLanguageResultExecution timeMemory
9206coreaWiring (kriii2_W)C++14
4 / 4
0 ms1088 KiB
#include <stdio.h>
#include <string.h>


int main() {
	long long N;
	scanf( "%lld", &N );

	if( N & 1 ) {
		printf( "%lld\n", N / 2 );
	} else {
		printf( "%lld\n", N - 1 );
	}
	return 0;
}
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