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"bits/stdc++.h"
#include<iostream>
#include<ostream>
#include<vector>
#include<string>
#include<algorithm>

#define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++)
#define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME
#define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__)
#define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__)



using namespace std;
using ll = long long;



void solve();

int main() {

   solve();
   return 0;

}

void solve() {

	ll n=0, max=0, min=0;

	while (cin >> n >> min >> max, n) {
		vector<ll> v(n+1);
		REP(i, n) {
			cin >> v[i+1];
		}

		ll g = -1e9, ans = 0;

		FOR(i, min , max+1) {
			if (g <= (v[i] - v[i + 1])) {
				g = (v[i] - v[i + 1]);
				ans = i;
			}
		}
		cout << ans << endl;
	}
}

C++: #include <iostream>
#include <iomanip>
#include <cstdio>
#include <string>
#include <cstring>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <complex>
#include <cmath>
#include <limits>
#include <climits>
#include <ctime>
#include <cassert>
using namespace std;

#define rep(i,a,n) for(int (i)=(a); (i)<(n); (i)++)
#define repq(i,a,n) for(int (i)=(a); (i)<=(n); (i)++)
#define repr(i,a,n) for(int (i)=(a); (i)>=(n); (i)--)
#define all(v) begin(v), end(v)
#define pb(a) push_back(a)
#define fr first
#define sc second
#define INF 2000000000
#define int long long int

#define X real()
#define Y imag()
#define EPS (1e-10)
#define EQ(a,b) (abs((a) - (b)) < EPS)
#define EQV(a,b) ( EQ((a).X, (b).X) && EQ((a).Y, (b).Y) )
#define LE(n, m) ((n) < (m) + EPS)
#define LEQ(n, m) ((n) <= (m) + EPS)
#define GE(n, m) ((n) + EPS > (m))
#define GEQ(n, m) ((n) + EPS >= (m))

typedef vector<int> VI;
typedef vector<VI> MAT;
typedef pair<int, int> pii;
typedef long long ll;

typedef complex<double> P;
typedef pair<P, P> L;
typedef pair<P, double> C;

int dy[]={0, 0, 1, -1};
int dx[]={1, -1, 0, 0};
int const MOD = 1000000007;

namespace std {
    bool operator<(const P& a, const P& b) {
        return a.X != b.X ? a.X < b.X : a.Y < b.Y;
    }
}

signed main() {
    int n, mi, ma;
    while(cin >> n >> mi >> ma) {
        if(!n && !mi && !ma) break;
        vector<int> v(n), s(n-1);
        rep(i,0,n) cin >> v[i];
        sort(v.begin(), v.end(), greater<int>());
        rep(i,0,n-1) s[i] = v[i] - v[i+1];

        mi--; ma--;
        int gap = 0, ans;
        repq(i, mi, ma) {
            if(gap <= s[i]) {
                gap = s[i];
                ans = i+1;
            }
        }
        cout << ans << endl;
    }
    return 0;
}

C++: // 2017/12/26 Tazoe

#include <iostream>
using namespace std;

int main()
{
	while(true){
		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-1; i<nmax; i++){
			int g = P[i]-P[i+1];

			if(gap<=g){
				gap = g;
				n = i+1;
			}

//			cout << i << ' ' << g << ' ' << gap << ' ' << n << endl;
		}

		cout << n << endl;
	}

	return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
int main(){
  while(1){
    int m,nmin,nmax,ans=0,max=0,p[200]={};
  cin>>m>>nmin>>nmax;
  if(m+nmin+nmax==0)break;
  for(int i=0;i<m;i++)cin>>p[i];
  for(int i=nmin;i<=nmax;i++)
    if(p[i-1]-p[i]>=max){
      max=p[i-1]-p[i];
      ans=i;
    }
  cout<<ans<<endl;
  }
  return 0;
}

C++: #include <bits/stdc++.h>
#define _overload(_1,_2,_3,name,...) name
#define _rep(i,n) _range(i,0,n)
#define _range(i,a,b) for(int i=(int)(a);i<(int)(b);++i)
#define rep(...) _overload(__VA_ARGS__,_range,_rep,)(__VA_ARGS__)
#define _all(arg) begin(arg),end(arg)

template<class T>bool chmax(T &a, const T &b) { return (a<=b)?(a=b,1):0; }

using namespace std;

int main(void){
	int m, nmin, nmax;
	while(cin>>m>>nmin>>nmax,m,nmin,nmax) {
		int res = 0;
		int n = 0;
		int prev = 0;
		rep(i,m) {
			int cur; cin >> cur;
			if(nmin<=i && i <= nmax) if(chmax(res, prev-cur)) n=i;
			prev = cur;
		}
		cout << n << endl;
	}
        
	return 0;
}

C++: #include <bits/stdc++.h>

using namespace std;

typedef long long  ll;

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    int m, min_n, max_n;

    while (cin >> m >> min_n >> max_n, m) {
        vector<int> p(m);
        for (int i = 0; i < m; ++i)
            cin >> p[i];
        sort(p.begin(), p.end(), greater<int>());

        int n = 0, gap = 0;
        for (int i = min_n; i <= max_n; ++i) {
            int tmp_gap = p[i - 1] - p[i];
            if (gap <= tmp_gap) {
                gap = tmp_gap;
                n = i;
            }
        }

        cout << n << endl;
    }

    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1 ; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1 ; } return 0; }
typedef long long ll;
typedef pair<int, int> pii;
const ll INF = 1e9+100;
const bool debug = 0;
/***************************************/

int M, Nmi, Nma;
int P[200];

int main() {
  while (cin >> M >> Nmi >> Nma, M || Nmi || Nma) {
    REP(i, M) scanf("%d", P + i);
    if (debug) putchar('@');

    pii ans(0, 0); // ギャップ, 人数

    FOR(i, Nmi - 1, Nma) {
      chmax(ans, pii(P[i]-P[i+1], i + 1));
    }

    cout << ans.se << endl;
  }
  return 0;
}

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

int main(){
    int m,nl,ns;
    while(cin>>m>>ns>>nl,m){
        vector<int> p(m);
        for(int i=0;i<m;i++) cin>>p[i];
        int res=0;
        int gap=0;
        for(int i=0;i<=10000;i++){
            int mi=1000000;
            int ma=0;
            int cnt=0;
            for(int j=0;j<m;j++){
                if(i<=p[j]){
                    cnt++;
                    mi=min(mi,p[j]);
                }
                else{
                    ma=max(ma,p[j]);
                }
            }
            int ga=mi-ma;
            if(ns<=cnt && cnt<=nl){
                if(gap<ga){
                    res=cnt;
                    gap=ga;
                }
                else{
                    res=max(cnt,res);
                }
            }
        }

        cout<<res<<endl;

    }
    return 0;

}

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

int m, nmin, nmax, p[200];
int diff, ans;

int main() {
  while (1) {
    scanf("%d%d%d", &m, &nmin, &nmax);
    if (m == 0) break;
    diff = -1;
    for (int i = 0; i < m; i++) scanf("%d", &p[i]);
    for (int i = nmin-1; i <= nmax-1; i++) {
      if (p[i] - p[i+1] >= diff) {
        ans = i;
        diff = p[i] - p[i+1];
      }
    }
    printf("%d\n", ans + 1);
  }
}