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- #include <cstdio>
- int main(){
- int oleg;
- scanf("%d", &oleg);
- for (int w=0; w<oleg; w++){
- int n;
- scanf("%d", &n);
- if (n==0){
- putchar('1');
- continue;
- }
- int x,y;
- scanf("%d%d", &x, &y);
- int t=((x-y)&1);
- int i=-1;
- for (i=1; i<n; i++){
- scanf("%d%d", &x, &y);
- if ((((x-y)&1)^t)==1){
- putchar('0');
- break;
- }
- }
- if (i==n) putchar('1');
- }
- putchar('\n');
- return 0;
- }
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