Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func nextInt(sc *bufio.Scanner) int {
	sc.Scan()
	i, err := strconv.Atoi(sc.Text())
	if err != nil {
		panic(err)
	}
	return i
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)

	for {
		m, nMin, nMax := nextInt(sc), nextInt(sc), nextInt(sc)
		if m == 0 && nMin == 0 && nMax == 0 {
			break
		}

		score_list := []int{}
		for i := 0; i < m; i++ {
			score_list = append(score_list, nextInt(sc))
		}

		// 最低合格者数と最高合格者数の間の各得点間のギャップが最大になる合格者数を取得する
		scoreGap := 0
		scoreGapMax := 0
		qualifiedNum := 0
		for n := nMin; n <= nMax; n++ {
			scoreGap = score_list[n-1] - score_list[n]
			if scoreGap >= scoreGapMax {
				scoreGapMax = scoreGap
				qualifiedNum = n
			}
		}

		fmt.Println(qualifiedNum)
	}
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
  int m, min, max, su, gap, temp;
  vector<int> p;

  while(1) {
    cin >> m >> min >> max;
    if(m == 0 && min == 0 && max == 0)
      break;

    for(int i = 0; i < m; i++) {
      int P;
      cin >> P;
      p.push_back(P);
    }

    // sort(p.begin(), p.end(), greater<int>());                               

    su = p[min-1]-p[min];
    gap = min;
    for(int i = min-1; i < max; i++) {
      temp  = p[i] - p[i+1];
      //cout << temp << ' ' << gap << endl;                                    
      if(temp >= su) {
        su = temp;
        gap = i+1;
      }
    }
    cout << gap << endl;
    p.clear();
  }

  return 0;
}

C++: #include <iostream>
#include <string>
#include <algorithm>
#include <vector>
using namespace std;
#define int long long

signed main() {
  while (true) {
    int m, n1, n2;
    cin >> m >> n1 >> n2;
    if (!m && !n1 && !n2) return 0;
    int p[m];
    for (int i = 0; i < m; i++) {
      cin >> p[i];
    }
    int diff = p[n1 - 1] - p[n1];
    int ans = n1;
    for (int i = n1 + 1; i <= n2; i++) {
      int res = p[i - 1] - p[i];
      if (res >= diff) {
        diff = res;
        ans = i;
      }
    }
    cout << ans << endl;
  }
}

C++: #include<iostream>
using namespace std;

int main(){
	while(1){
		int m,nmin,nmax,;
		cin>>m>>nmin>>nmax;
		if(m==0&&nmin==0&&nmax==0){
			break;
		}
		int P[200];
		for(int i=0;i<m;i++){
			cin>>P[i];
		}
		int gap=-1;
		int n=-1;
		for(int i=nmin;i<=nmax;i++){
			int g=P[i-1]-P[i];
			if(gap<=g){
				gap=g;
				n=i;
			}
		}
		cout<<n<<endl;
	}
	return 0;
}

C++: #include <iostream>
using namespace std;
int main() {
    int m, n_min, n_max;
    while(cin>>m>>n_min>>n_max){
        if(m==0&&n_min==0&&n_max==0)break;

        int p[m+2];
        for(int i=1; i<=m; i++)cin>>p[i];

        int gap=-1,ans;
        for(int i=n_min; i<=n_max; i++){
            if(gap<=p[i]-p[i+1]){
                gap=p[i]-p[i+1];
                ans=i;
            }
        }
        cout << ans << endl;
    }
    return 0;
}

C++: #include <bits/stdc++.h>
 
using namespace std;
typedef long long ll;
 
#define rep(i, n) for(int i=0; i<(n); ++i)

int p[10001];
int main(void){
    int m, n_min, n_max;
    while(cin >> m >> n_min >> n_max && m) {
        rep(i, m) cin >> p[i];
        sort(p, p+m, greater<int>());
        int gap = 0;
        int ans = 0;
        for(int i=n_min; i<=n_max; ++i) {
            if(p[i-1]-p[i] >= gap) {
                gap = p[i-1]-p[i];
                ans = i;
            }
        }
        cout << ans << endl;
    }
}

C++: #define _USE_MATH_DEFINES
#define INF 0x3f3f3f3f

#include <iostream>
#include <cstdio>
#include <sstream>
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include <queue>
#include <stack>
#include <limits>
#include <map>
#include <string>
#include <cstring>
#include <set>
#include <deque>
#include <bitset>
#include <list>
#include <cctype>
#include <utility>
  
using namespace std;
  
typedef long long ll;
typedef pair <int,int> P;
typedef pair <int,P> PP;
  
static const double EPS = 1e-8;
  
int tx[] = {0,1,0,-1};
int ty[] = {-1,0,1,0};

int main(){
  int num_student;
  int num_min_pass;
  int num_max_pass;
  while(~scanf("%d %d %d", &num_student, &num_min_pass, &num_max_pass)) {
    if (num_student == 0) break;

    int score[10000];
    for (int student_i = 0; student_i < num_student; student_i++) {
      scanf("%d", &score[student_i]);
    }
    sort(score,score + num_student, greater<int>());
    int diff = -1;
    int res = 0;
    for (int pass_i = num_min_pass - 1; pass_i < num_max_pass; pass_i++) {
      int min_pass_score = score[pass_i];
      int max_fail_score = score[pass_i + 1];
      if (diff <= min_pass_score - max_fail_score) {
	diff = min_pass_score - max_fail_score;
	res = pass_i + 1;
      }
    }
    printf("%d\n",res);
  }
}

C++: #include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cassert>
#include <climits>
#include <algorithm>
#include <string>
#include <sstream>
#include <complex>
#include <vector>
#include <list>
#include <queue>
#include <deque>
#include <stack>
#include <map>
#include <set>
#include <fstream>

using namespace std;
#define SZ(x) (int)(x).size()
#define REP(i,n) for(int i=0;i<(n);i++)
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REPR(i,n) for(int i=(n)-1;i>=0;i--)
#define ALL(s) (s).begin(), (s).end()
#define so(V) sort(ALL(V))
#define rev(V) reverse(ALL(V))
#define uni(v) v.erase( unique(ALL(v)) , v.end());

typedef long long unsigned int llu;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;
typedef vector<bool> vb;
const double EPS = 1e-9;
const int MOD = 1e9 + 7;
const int INF = (1 << 29);
const ll LINF = 1e18;
const double PI = acos(-1);

template<typename T>vector<T> make_v(size_t a) { return vector<T>(a); }
template<typename T, typename... Ts>auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...)); }
template<typename T, typename U, typename... V>
typename enable_if<is_same<T, U>::value != 0>::type
fill_v(U & u, const V... v) { u = U(v...); }
template<typename T, typename U, typename... V>
typename enable_if<is_same<T, U>::value == 0>::type
fill_v(U & u, const V... v) { for (auto& e : u) fill_v<T>(e, v...); }
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T& a, const T& b) { if (a > b) { a = b; return 1; } return 0; }

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	int M, Nl, Nh;
	cin >> M >> Nl >> Nh;
	while (M != 0) {
		vi P(M);
		REP(i, M) {
			cin >> P[i];
		}
		so(P); rev(P);
		int ans = 0;
		int cur = -1;
		FOR(i, Nl, Nh + 1) {//i人合格
			// 高　0,1,2, ... i-1|i,i+1, ...　低
			if (P[i - 1] - P[i] >= cur) {
				cur = P[i - 1] - P[i];
				ans = i;
			}
		}
		cout << ans << endl;
		cin >> M >> Nl >> Nh;
	}
	return 0;
}

C++: //#define _GRIBCXX_DEBUG
#include <bits/stdc++.h>
# define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;

int main() {
  int n, left, right;
  vector<int> p;

  while (cin >> n >> left >> right, n) {
    p.resize(n);
    rep (i, n) cin >> p[i];

    sort(p.begin(), p.end());
    reverse(p.begin(), p.end());

    int n_passed = 0;
    int max_gap = 0;

    rep (i, n-1) {
      // cout << "i: " << i << endl;
      if (! (left <= i+1 && i+1 <= right) ) continue;
      // cout << "passed " << i+1 << " students (lowest: " << left << ", highest: " << right << ")" << endl;
      // cout << "current gap: " << p[i] - p[i+1] << endl;

      if (max_gap <= p[i] - p[i+1]) {
        // cout << "new gap: " << p[i] - p[i+1] << endl;
        // cout << left << ", " << i+1 << ", " << right << endl;
        // cout << "update" << endl;
        n_passed = i+1;
        max_gap = p[i] - p[i+1];
      }
    }
    cout << n_passed << endl;
  }
  return 0;
}