0_0_20801945_11247.cpp:1:1: error: 'include' does not name a type
include<stdio.h>
^
0_0_20801945_11247.cpp: In function 'int main()':
0_0_20801945_11247.cpp:18:18: error: 'scanf' was not declared in this scope
scanf("%d",&n);
^
0_0_20801945_11247.cpp:22:47: error: 'printf' was not declared in this scope
printf("%.3lf\n",fabs(a[x2][y2]-a[x1][y1]));
^
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