CSU1614:First Blood

Description

Zuosige always has bad luck. Recently, he is in hospital because of pneumonia. While he is taking his injection, he feels extremely bored. However, clever Zuosige comes up with a new game.

Zuosige draws some circles randomly on the paper and he wants to know how many circles have no common points with others. If a circle have no common points with another circle, they must be out of each other. This is such a simple problem and can you help him?

Input

The first line contains one integer T, indicating the number of test cases.
In one test case, there are several lines.
In the first line, there are an integer N (2<=N<=100), indicating the number of circles.
In the following N lines, there are three integers x_i, y_i, r_i (0<=|x_i|, |y_i|<=1000, 1<=r_i<=1000), indicating the coordinates and the radius of the i-th circle.

Output

For each test case, output an integer indicating the answer.

Sample Input

231 -1 710 -7 5-9 -4 136 2 8-10 1 5-2 2 7

Sample Output

10

HINT

Source

题意:求有几个圆玉其他所有圆都不想交

#include <iostream> #include <stdio.h> #include <string.h> #include <stack> #include <queue> #include <map> #include <set> #include <vector> #include <math.h> #include <algorithm> using namespace std; #define ls 2*i #define rs 2*i+1 #define up(i,x,y) for(i=x;i<=y;i++) #define down(i,x,y) for(i=x;i>=y;i--) #define mem(a,x) memset(a,x,sizeof(a)) #define w(a) while(a) #define LL long long const double pi = acos(-1.0); #define N 50005 #define mod 19999997 const int INF = 0x3f3f3f3f; #define exp 1e-8   struct node {     int x,y,r; }a[105]; bool vis[105][105]; int main() {     int i,j,k,t,n;     cin >> t;     w(t--)     {         cin >> n;         up(i,0,n-1)         scanf("%d%d%d",&a[i].x,&a[i].y,&a[i].r);         mem(vis,false);         up(i,0,n-1)         {             up(j,0,n-1)             {                 int t1 = (a[i].x-a[j].x)*(a[i].x-a[j].x)+(a[i].y-a[j].y)*(a[i].y-a[j].y);                 int t2 = (a[i].r+a[j].r)*(a[i].r+a[j].r);                 if(t1>t2) vis[i][j]=vis[j][i] = true;             }         }         int ans = 0,flag;         up(i,0,n-1)         {             flag = 0;             up(j,0,n-1)             {                 if(i!=j && !vis[i][j]) flag = 1;             }             if(!flag)             ans++;         }         cout<<ans<<endl;     }       return 0; }