Submission #535907

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Source Code Expand

//include
//------------------------------------------
#include <bits/stdc++.h>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
inline long long toLL(string s) {long long v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef pair<long, long> PLL;
typedef long long LL;
//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(long i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
#define CLR(a) memset((a), 0 ,sizeof(a))

const double EPS=1e-9;

int main(){
	double n,m;
	cin>>n>>m;
	if(n>=12)n-=12;
	double cho=n*30.0+m/2.0;
	double tan=m*6.0;
	double rng=abs(cho-tan);
	cout<<fixed<<setprecision(10)<<min(rng,360.0-rng)<<endl;
	return 0;
	
}

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