Submission #978127

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Source Code Expand

#include<bits/stdc++.h>
#define rep(i,n)for(int i=0;i<n;i++)
using namespace std;

double r, n, m;
double func(double d) {
	double k = abs(d - r);
	return sqrt(r*r - k*k) * 2;
}
int main() {
	scanf("%lf%lf%lf", &r, &n, &m);
	double cnt = 0;
	for (double i = 1; i <= n + m - 1; i++) {
		double t = i - m;
		if (t <= 0)cnt += func(r * 2 / n*i);
		else if (i >= n)cnt += func(r * 2 / n*t);
		else cnt += max(func(r * 2 / n*i), func(r * 2 / n*t));
	}
	printf("%.16lf\n", cnt);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lf%lf%lf", &r, &n, &m);
                                ^

Judge Result