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- #include<stdio.h>
- #include<stdlib.h>
- void nhap(int **arr,int dong)
- {
- for(int i=0;i<dong;i++)
- {
- for(int j=0;j<3;j++)
- {
- scanf("%d",*(arr+i)+j);
- }
- }
- }
- void kiem_tra(int **arr,int dong)
- {
- int p=0;
- for(int i=0;i<dong;i++)
- {
- if(arr[i][0]==0&&arr[i][1]>=30&&arr[i][2]==1)
- {
- p++;
- }
- }
- printf("%d",p);
- }
- int main()
- {
- int dong;
- scanf("%d",&dong);
- int **arr=(int **)calloc(dong,sizeof(int*));
- for(int i=0;i<dong;i++)
- {
- *(arr+i)=(int *)calloc(3,sizeof(int));
- }
- nhap(arr,dong);
- kiem_tra(arr,dong);
- return 0;
- }
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