cf 559a **
题意：给一个六边形，求小三角形个数
1 #include<cstdio> 2 #include<iostream> 3 #include<algorithm> 4 #include<cstring> 5 #include<cmath> 6 #include<queue> 7 #include<map> 8 using namespace std; 9 #define MOD 1000000007 10 const int INF=0x3f3f3f3f; 11 const double eps=1e-5; 12 typedef long long ll; 13 #define cl(a) memset(a,0,sizeof(a)) 14 #define ts printf("*****\n"); 15 const int MAXN=1005; 16 int n,m,tt; 17 int a[MAXN]; 18 int main() 19 { 20 int i,j,k; 21 #ifndef ONLINE_JUDGE 22 freopen("1.in","r",stdin); 23 #endif 24 int a1,a2,a3,a4,a5,a6; 25 while(~scanf("%d%d%d%d%d%d",&a1,&a2,&a3,&a4,&a5,&a6)) 26 { 27 printf("%d\n",(a1+a2+a3)*(a1+a2+a3)-a5*a5-a3*a3-a1*a1); 28 } 29 }
