Go: package main
// 三角形の形は辺の長さで決まる． 順番に３つの正整数が与えられたとき， 辺の長さがそれらの値と一致する三角形が存在するかどうかを調べ,
//  存在するなら鋭角三角形，直角三角形，鈍角三角形のいずれかを判定し， 次の入力へ進む． 三角形が存在しないとき， それまでに入力された，
// 三角形，直角三角形，鋭角三角形，鈍角三角形の 個数を空白で区切って出力し， それ以降の入力は無視して終了する
// 入力の中には必ず三角形が存在しないようなものがある と仮定してよい. 入力の行数は判らないが各行には３つの正整数が空白で区切って書かれている．
//  ただし，各整数は100 以下とする.

// return
// 三角形 直角三角形　鈍角三角形 鈍角三角形
import (
	"os"
	"fmt"
	"bufio"
)


var sc = bufio.NewScanner(os.Stdin)

func max(a, b, c int) (int, int, int) {
	if a > b {
		if b > c {
			return a, b, c
		} else {
			return a, c, b
		}
	} else {
		if a > c {
			return b, a, c
		} else {
			return b, c, a
		}
	}
}

func find_trianges(a, b, c int) string {
	a, b, c = max(a, b, c)
	r := b*b + c*c
	if a*a > r {
		return "obtuse_triangle"
	} else if a*a < r {
		return "sharped_triangle"
	} else {
		return "right_triangle"
	}
}

func main() {
	s := bufio.NewScanner(os.Stdin)
	var t, r_t, s_t, o_t int = 0, 0, 0, 0
	for s.Scan() {
		var a, b, c int
		fmt.Sscan(s.Text(), &a, &b, &c)
			a, b, c = max(a, b, c)
			if (a < b + c) {
				r := find_trianges(a, b, c)
				switch r {
				case "right_triangle":
					r_t++
				case "sharped_triangle":
					s_t++
				case "obtuse_triangle":
					r_t++
				}
				t++
			}	else {
				break
			}
			
	}
	fmt.Println(t, r_t, s_t, o_t)
}

C++: #include <cstdio>
#include <iostream>
#include <algorithm>
using namespace std;
int a,b,c,d;
int x,y,z;
int main(void){
  bool f = false;
  while(cin >> x >> y >> z){
    if(x < y) swap(x,y);
    if(x < z) swap(x,z);
    if(f || x >= y+z){
      f = true;
      continue;
    }
    a++;
    if(x*x < y*y+z*z) b++;
    else if(x*x == y*y+z*z) c++;
    else d++;
  }
  printf("%d %d %d %d\n",a,c,b,d);
}

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

int main(int argc, char const *argv[])
{
	int v[3], ans1=0, ans2=0, ans3=0, ans4=0;
	while (1)
	{
		cin >> v[0] >> v[1] >> v[2];
		sort(v, v+3);
		if(v[2] >= v[0] + v[1]) break;
		++ans1;
		if(v[2]*v[2] == v[0]*v[0] + v[1]*v[1])  ++ans2;
		else if(v[2]*v[2] < v[0]*v[0] + v[1]*v[1])  ++ans3;
		else ++ans4;
	}
	cout << ans1 << " " << ans2 << " " << ans3 << " " << ans4 << endl;
	return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <vector>
#include <functional>
#include <ostream>

using std::cin;
using std::cout;
using std::cerr;
using std::endl;

std::ostream& operator << (std::ostream& os, const std::vector<int>& v) {
  for (int i = 0; i < int(v.size()); ++i) {
    os << v[i];
    if (i != int(v.size()) - 1) cout << " ";
  }
  return os;
}

int main() {
  std::vector<int> tri(4, 0), edge(3);

  while (cin >> edge[0] >> edge[1] >> edge[2]) {
    std::sort(edge.begin(), edge.end(), std::greater<int>());

    int largest = edge[0] * edge[0], others = edge[1] * edge[1] + edge[2] * edge[2];

    if (edge[0] >= edge[1] + edge[2]) {
      break;
    }
    else if (largest == others) {
      tri[1]++;
    }
    else if (largest < others) {
      tri[2]++;
    }
    else if (largest > others) {
      tri[3]++;
    }

    tri[0]++;
  }

  cout << tri << endl;

  return 0;
}

C++: 
#include<algorithm>
#include<iostream>

using namespace std;

int main() {
  int i;

  int a[3], b[3] = { };
  while(cin >> a[0] >> a[1] >> a[2]) {
    sort(a, a + 3);
    if(a[0] + a[1] <= a[2]) break;
    ++b[min(max(-1, a[0] * a[0] + a[1] * a[1] - a[2] * a[2]), 1) + 1];
  }
  while(cin >> a[0] >> a[0] >> a[0]) ;

  cout << b[0] + b[1] + b[2] << ' ' << b[1] << ' ' << b[2] << ' ' << b[0] <<
    endl;
  return 0;
}

C++: #include <bits/stdc++.h> // only for GCC
using namespace std;

inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

template<class T> inline T sqr(T x) {return x*x;}

typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef unsigned long long ULL;

#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

const double EPS = 1e-10;
const double PI  = acos(-1.0);

#define CLR(a) memset((a), 0 ,sizeof(a))

#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

int dx[8] = {-1, 0, 1, 0, -1, -1, 1, 1};
int dy[8] = {0, -1, 0, 1, -1, 1, -1, 1};

int main() {
  int len[3];  
  int tri[4] = {};

  while(cin >> len[0] >> len[1] >> len[2]) {
    sort(len, len+3);
    int a = len[0], b = len[1], c = len[2];
    
    if(c >= a + b) break;
    tri[0]++;
    if(c*c == a*a + b*b) tri[1]++;
    else if(c*c < a*a + b*b) tri[2]++;
    else tri[3]++;
  }
  
  REP(i, 3) cout << tri[i] << ' ';
  cout << tri[3] << endl;
}

C++: #include <bits/stdc++.h>
#define rep(i,a,n) for(int i=a;i<n;i++)
#define repb(i,a,b) for(int i=a;i>=b;i--)
#define all(a) a.begin(),a.end()
#define o(a) cout<<a<<endl
#define int long long
#define fi first
#define se second
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pii;

signed main(){
	vi t(3);
	vvi l;
	while(1){
		rep(i,0,3) cin>>t[i];
		sort(all(t));
		l.push_back(t);
		if(cin.eof()) break;
	}
	int d[4]={};
	rep(i,0,l.size()){
		int a=l[i][0],b=l[i][1],c=l[i][2];
		if(a+b<=c) break;
		d[0]++;
		if(a*a+b*b==c*c) d[1]++;
		else if(a*a+b*b>c*c) d[2]++;
		else d[3]++;
	}
	cout<<d[0]<<" "<<d[1]<<" "<<d[2]<<" "<<d[3]<<endl;
}

C++: #include<cstdio>
#include<queue>
#include<utility>
#include<cstring>
#include<stack>
#include<algorithm>
#include<cmath>
#include<iostream>
#define MAX_N 100001
#define INF 2147483647
#define REP(i,n) for(int i=0;i<(int)(n);i++)
void init(int n);
int find(int n);
void unite(int x,int y);
bool same(int x, int y);
int dx[4] = {1,0,0,-1};
int dy[4] = {0,1,-1,0};
using namespace std;
int main()
{
  int A,B,C,d[3],count=0,donkaku=0,tyokkaku=0,eikaku=0;
  while(1){
    cin >> A >> B >> C;
    if(((A + B) > C) && ((A + C) > B) && ((B + C) > A)){
      d[0] = A;
      d[1] = B;
      d[2] = C;
      sort(d,d+3);
      if((d[0]*d[0] + d[1]*d[1]) < d[2]*d[2])
        donkaku++;
      else if((d[0]*d[0] + d[1]*d[1]) == (d[2]*d[2]))
        tyokkaku++;
      else
        eikaku++;
      count++;
    }else{
      cout << count << " " << tyokkaku << " " << eikaku << " " << donkaku << endl;
      break;
    }
  }
  return 0;
}

int par[MAX_N];
int ranks[MAX_N];

//n要素で初期化
void init(int n){
  REP(i,n){
    par[i] = i;
    ranks[i] = 0;
  }

}

//木の根を求める
int find(int x){
  if(par[x] == x){
    return x;
  }else{
    return par[x] = find(par[x]);
  }
}

void unite(int x,int y){
  x = find(x);
  y = find(y);
  if(x == y) return ;
  if(ranks[x] < ranks[y]){
    par[x] = y;
  }else{
    par[y] = x;
    if(ranks[x] == ranks[y]) ranks[x]++;
  }
}

bool same(int x, int y){
  return find(x) == find(y);
}

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

int main(){
  int hen[3];
  int cnt=0;
  int d=0;
  int e=0;
  
  while(1)
    {
      for(int i=0;i < 3;i++)
	{
	  cin >> hen[i];
	}
      sort(hen,hen+3);

      int judge = pow(hen[0],2) + pow(hen[1],2);
      int most = pow(hen[2],2);
      
      if(hen[0]+hen[1] > hen[2] && hen[1]+hen[2] > hen[0] && hen[2]+hen[0] > hen[1])
	{
	  if(judge < most)
	    {
	      d++;
	    }
	  else if(judge > most)
	    {
	      e++;
	    }
	  else if(judge == most)
	    {
	      cnt++;
	    }
	}
      else
	{
	  break;
	}
    }
  cout << cnt+e+d << " " << cnt << " " << e << " " << d << endl;
  return 0;
}