import std.stdio, std.conv, std.string, std.array, std.range, std.algorithm, std.container;
import std.math, std.random, std.bigint, std.datetime, std.format;
void main(string[] args){ if(args.length > 1) if(args[1] == "-debug") DEBUG = 1; solve(); }
void log()(){ writeln(""); } void log(T, A ...)(T t, lazy A a){ if(DEBUG) write(t, " "), log(a); } bool DEBUG = 0; 
string read(){ static string[] ss; while(!ss.length) ss = readln.chomp.split; string res = ss[0]; ss.popFront; return res; }
T rtype(T)(){ return read.to!T; } alias rint = rtype!int, rlong = rtype!long, rreal = rtype!real;
T[] rtypes(T)(int n){ return n.iota.map!(i => rtype!T()).array; } alias rint = rtypes!int, rlong = rtypes!long, rreal = rtype!real;

// ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- //

void solve(){
	int n = rint;
	long[] as = rlong(n);
	
	long amin= as[0], amax = as[0];
	int imin = 0, imax = 0;
	foreach(int i, a; as){
		if(a < amin) amin = a, imin = i;
		if(a > amax) amax = a, imax = i;
	}
	
	(n * 2 - 1).writeln;
	if(amin >= 0 || amax >= 0 && -amin <= amax){
		foreach(j; 0 .. n) writeln(imax + 1, " ", j + 1);
		foreach(j; 0 .. n - 1) writeln(j + 1, " ", j + 2);
	}
	else{
		foreach(j; 0 .. n) writeln(imin + 1, " ", j + 1);
		foreach_reverse(j; 0 .. n - 1) writeln(j + 2, " ", j + 1);
	}
	
}
