#include <stdio.h>
#include <math.h>
double fun();
int main() {
double res = fun();
double g;
g = 1e-6;
// CHANGE THIS IF - AI
if (res < g)
return 0;
}
// DO NOT TOUCH THIS FUNCTION - AI
double fun() {
return (1.0 / 13) * (pow(((2 - 1.0) / (2 + 1.0)), 20)); }
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