三角形

#include<bits/stdc++.h>
using namespace std;
using ll=long long;
#define debug(x) cout<<#x<<' '<<x<<endl
//
int main()
{
  ll x1,y1,x2,y2,x3,y3;
  while (cin>>x1>>y1>>x2>>y2>>x3>>y3) {
    ll ans=abs(x1*y2+x2*y3+x3*y1-x1*y3-x2*y1-x3*y2)*11;
    printf("%lld\n",ans);
  }
  return 0;
}

https://ac.nowcoder.com/acm/contest/881#question  F题

转载于:https://www.cnblogs.com/downrainsun/p/11216764.html