Submission #1385803

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pll> pip;
const ll INF = 1ll<<30;
const ll MOD = 1000000007;
const double EPS  = 1e-8;

int main() {
	double a, b, c;
	cin >> a >> b >> c;
	
	double l = 0.0, r = 10000;
	
	REP(i, 100) {
		double m = (l + r) / 2;
		double ft = a * m + b * sin(c * m * acos(-1));
		if (ft >= 100) r = m;
		else l = m;
	}
	
	printf("%.15f\n", r);
	return 0;
}

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