Submission #1357664

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define FOR(i,l,r) for(int i = (int) (l);i < (int) (r);i++)
template<typename T> bool chmax(T& a,const T& b){ return a < b ? (a = b,true) : false; }
template<typename T> bool chmin(T& a,const T& b){ return b < a ? (a = b,true) : false; }
typedef long long ll;

const int N = 3;
int A [N];
const int INF = 1e9;
const double PI = acos(-1.0);

int main()
{
	FOR(i,0,N){
		scanf("%d",&A [i]);
	}
	sort(A,A + N);

	int mn = INF,mx = -INF;
	if(A [0] + A [1] > A [2]){
		chmin(mn,0);
	}
	FOR(mask,0,1 << N){
		int sum = 0;
		FOR(i,0,N){
			if(mask >> i & 1){
				sum += A [i];
			}
			else{
				sum -= A [i];
			}
		}
		chmin(mn,abs(sum));
		chmax(mx,abs(sum));
	}

	double ans = mx * mx * PI - mn * mn * PI;
	printf("%.10f\n",ans);

	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:17:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&A [i]);
                     ^

Judge Result