Submission #1101537

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Source Code Expand

#include <bits/stdc++.h>
#define ll long long
#define INF 999999999
#define MOD 1000000007
#define rep(i,n) for(int i=0;i<n;i++)

using namespace std;

typedef pair<int,int>P;

const int MAX_N = 100005;

pair<double,double> cur[3];

int main()
{
	double x,y;
	rep(i,3){
		scanf("%lf%lf",&x,&y);
		cur[i].first = x;
		cur[i].second = y;
	}
	double a,b,c;
	a = sqrt(pow((cur[0].first-cur[1].first),2) + pow((cur[0].second-cur[1].second),2));
	b = sqrt(pow((cur[1].first-cur[2].first),2) + pow((cur[1].second-cur[2].second),2));
	c = sqrt(pow((cur[2].first-cur[0].first),2) + pow((cur[2].second-cur[0].second),2));
	double nmax = max(a,max(b,c));
	double len = a+b+c;
	pair<double,double> A,B;
	A.first = cur[1].first - cur[0].second;
	A.second = cur[1].second - cur[0].second;
	B.first = cur[2].first - cur[0].second;
	B.second = cur[2].second - cur[0].second;
	double cosac,sinac;
	cosac = (A.first*B.first+A.second*B.second)/(a*c);
	sinac = sqrt(1-pow(cosac,2));
	double S = a*c*sinac/2.0;
	double ans = S/(len/2 + 2*S/nmax);
	printf("%.12f\n",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf%lf",&x,&y);
                        ^

Judge Result