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Link: http://codepad.org/vEuthogm    [ raw code | output | fork ]

C++, pasted on Jan 17:
#include<stdio.h>
//#include<stdlib.h>
int main()
{
    int test,w,minus,a,b,tf=1,fin=0;
    scanf("%d",&test);
    while(test--)
    {
        scanf("%d",&w);
        scanf("%d %d",&a,&b);
        minus=a-b;
        w--;
        while(w--)
        {
            scanf("%d %d",&a,&b);
            fin=a-b;
            if(fin!=minus)
            tf=0;
        }
        if(tf==1)
        printf("yes\n\n");
        else
        printf("no\n\n");
	}
	//system("pause");
	return 0;
}


Output:
1
Timeout


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