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 c, a, b
		}
	} else {
		if b > c {
			return b, a, c
		} else {
			return c, b, 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":
					o_t++
				}
				t++
			}	else {
				break
			}
			
	}
	fmt.Println(t, r_t, s_t, o_t)
}

C++: #include<iostream>
#include<algorithm>
#include<climits>
#include<cmath>
#include<cstdio>
#include<cstdlib>
#include<ctime>
#include<string>
#include<cstring>
#include<vector>
#include<stack>
#include<queue>
#include<set>
#include<bitset>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;

#define PI 3.141592653589793238462643383279
#define mod 1000000007LL
#define rep(i, n) for(i = 0;i < n;++i)
#define rep1(i, n) for(i = 1;i < n;++i)
#define per(i, n) for(i = n - 1;i > -1;--i)
#define int(x) int x; scanf("%d",&x)
#define int2(x, y) int x, y; scanf("%d%d",&x, &y)
#define int3(x, y, z) int x, y, z; scanf("%d%d%d",&x, &y, &z)
#define int4(v, x, y, z) int v, x, y, z; scanf("%d%d%d%d", &v, &x, &y, &z)
#define int5(v, w, x, y, z) int v, w, x, y, z; scanf("%d%d%d%d%d", &v, &w, &x, &y, &z)
#define ll2(x, y) ll x, y; cin >> x >> y;
#define scn(n, a) rep(i, n)cin >> a[i]
#define sc2n(n, a, b) rep(i, n)cin >> a[i] >> b[i]
#define pri(x) cout << (x) << "\n"
#define pri2(x, y) cout << (x) << " " << (y) << "\n"
#define pri3(x, y, z) cout << (x) << " " << (y) << " " << (z) << "\n"
#define pb push_back
#define mp make_pair
#define all(a) (a).begin(),(a).end()
#define endl "\n"
#define kabe puts("---------------------------")
#define kara puts("")
#define debug(x) cout << " --- " << (x) << "\n"
#define debug2(x, y) cout << " --- " << (x) << " " << (y) << "\n"
#define debug3(x, y, z) cout << " --- " << (x) << " " << (y) << " " << (z) << "\n"
#define X first
#define Y second
#define eps 0.0001
#define prid(x) printf("%.15lf\n", x)

int a[3];
int res[4] = {0};

signed main(void){
  int i, j;
  for(int testcase = 0;testcase >= 0;testcase++){
    scanf("%d%d%d", &a[0], &a[1], &a[2]);
    sort(a, a + 3);
    ++res[0];
    if(a[0] <= 0 || a[1] <= 0 || a[2] <= 0 || a[2] >= a[1] + a[0])break;
    else if(a[2] * a[2] == a[0] * a[0] + a[1] * a[1])++res[1];
    else if(a[2] * a[2] > a[0] * a[0] + a[1] * a[1])++res[3];
    else ++res[2];


//*/

//*/ break;
  }
  printf("%d %d %d %d\n", res[0] - 1, res[1], res[2], res[3]);
  return 0;
}

C++: #include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
#include <cstring>
#include <deque>
#include <iomanip>
#include <limits>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
#define CLR(mat) memset(mat, 0, sizeof(mat))
typedef long long ll;
int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  int a[3];
  int ans[4]; // 個数直角鋭角鈍角
  CLR(ans);
  while(cin>>a[0]>>a[1]>>a[2]) {
    sort(a,a+3);
    if(a[2] >= a[1] + a[0]) break;
    ans[0]++;
    if(a[2]*a[2]==a[1]*a[1]+a[0]*a[0]) ans[1]++;
    if(a[2]*a[2]<a[1]*a[1]+a[0]*a[0]) ans[2]++;
    if(a[2]*a[2]>a[1]*a[1]+a[0]*a[0]) ans[3]++;
  }
  FOR(i,0,4) {
    if(i) cout << " ";
    cout << ans[i];
  }
  cout << endl;
  return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int t[3],x,y;
int a=0,b=0,c=0;
int main(){
  while(1){
    cin>>t[0]>>t[1]>>t[2];
    sort(t,t+3);
    x=t[0]*t[0]+t[1]*t[1];
    y=t[2]*t[2];
    if(t[0]+t[1]<=t[2]){
      break;
    }else if(x==y){
      a++;
    }else if(x>y){
      b++;
    }else if(x<y){
      c++;
    }
  }
  cout<<a+b+c<<' '<<a<<' '<<b<<' '<<c<<endl;
  return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main(){
  int a[3];
  int s=0,e=0,d=0,t=0;
  while(cin>>a[0]>>a[1]>>a[2]){
    sort(a,a+3);
    if(a[0]+a[1]>a[2]){
      s++;
      if(a[0]*a[0]+a[1]*a[1]<a[2]*a[2]) d++;
      else if(a[0]*a[0]+a[1]*a[1]==a[2]*a[2]) t++;
      else if(a[0]*a[0]+a[1]*a[1]>a[2]*a[2]) e++;
    }
  }
  cout << s << ' ' << t << ' ' << e << ' ' << d << endl;
  return 0;
}

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

using namespace std;

int sankaku,eikaku,tyokkaku,donkaku;
int hen[3];
bool musi;

int main(void){

  sankaku = eikaku = tyokkaku = donkaku = 0;
  musi = false;

  while( cin >> hen[0] >> hen[1] >> hen[2] ){

    if( !musi ){

      sort( hen , hen + 3 );

      if( hen[2] >= hen[0] +  hen[1] ){
	musi = true;
	continue;
      }
      sankaku++;

      for( int i = 0 ; i < 3 ; i++ )
	hen[i] = pow( (double)hen[i] , 2 );

      if( hen[2] == hen[0] + hen[1] ) tyokkaku++;
      if( hen[2] < hen[0] + hen[1] ) eikaku++;
      if( hen[2] > hen[0] + hen[1] ) donkaku++;
      
      
    }
  }
  cout << sankaku << " " << tyokkaku << " " << eikaku << " " << donkaku << endl;
  return 0;
}

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

int main(){
  vector<int> a(3);
  int cnt[4] = {0, 0, 0, 0};
  while (cin >> a[0] >> a[1] >> [2]) {
    if (a[0] + a[1] > a[2] && a[0] + a[2] > a[1] && a[1] + a[2] > a[0]) {
      cnt[0] ++;
      sort(a.begin(), a.end());
      if (a[0] * a[0] + a[1] * a[1] > a[2] * a[2])  cnt[1] ++;
      if (a[0] * a[0] + a[1] * a[1] == a[2] * a[2]) cnt[2] ++;
      if (a[0] * a[0] + a[1] * a[1] < a[2] * a[2])  cnt[3] ++;
    }
  }

  cout << cnt[0];
  cout << " " << cnt[1];
  cout << " " << cnt[2];
  cout << " " << cnt[3];
  cout << endl;
}

C++: #include<cstdio>
int main(void){
    
    int a=0,b=0,c=0;
    int change=0;
    int right=0,obtuse=0,acute=0;
    int value=0,check=0,count=0;
    int flag=true;
    while(flag){
        count++;
        scanf("%d%d%d",&a,&b,&c);
        if(c<a){
            change=a;
            a=c;
            c=a;
        }
        if(c<b){
            change=b;
            b=c;
            c=b;
        }
        check=a+b-c;
        value=a*a+(b*b-c*c);
        if(check<=0){
            break;
        }
        if(value==0){
            right++;
        }
        else if(value<0){
            obtuse++;
        }
        else{
            acute++;
        }
    }
    printf("%d %d %d %d",count,right,acute,obtuse);
    return 0;
}