//Bai ( Phan test Do thi) #include #include #include #include int a[20][20],n,chuaxet[20]; FILE *f; void ReadData(void){ int i,j,k=0;char *s,*s1; f=fopen("dothi.in","r"); fgets(s,255,f); n=atoi(s); for (i=1;i