ACM (TJU) : 2994


#include <stdio.h>

int main ()
{
	int testCase;
	scanf ("%d", &testCase);

	int a [12];
	int b [12];

	while ( testCase-- ) {

		int n;
		scanf ("%d", &n);

		int i;

		for ( i = 0; i < n; i++ ) 
			scanf ("%d", &a[i]);
		for ( i = 0; i < n; i++ )
			scanf ("%d", &b[i]);

		int res = 0;
		for ( i = 0; i < n; i++ )
			res += ( a [i] * b [i] );

		printf ("%d\n", res);
	}

	return 0;
}

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