Submission #3221560

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
#define MAXN 55
int v[MAXN];
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int N;
	cin >> N;
	int me = 1e9, ma = -1e9;
	int ime, ima;
	for(int i = 0; i < N; i++){
		cin >> v[i];
		if(me > v[i]) me = v[i], ime = i;
		if(ma < v[i]) ma = v[i], ima = i;
	}
	cout << N+N - 2 << "\n";
	if(abs(me) > abs(ma)){
		for(int i = 0; i < N; i++){
			if(i != ime) {
				cout << ime + 1 << " " << i+1 << "\n";
				v[i] += v[ime];
			}
		}
		for(int i = N-1; i >= 1; i--){
			cout << i+1 << " " << i << "\n";
		}
	}
	else{
		for(int i = 0; i < N; i++){
			if(i != ima) {
				cout << ima + 1 << " " << i+1 << "\n";
				v[i] += v[ima];
			}
		}	
		for(int i = 1; i < N; i++){
			cout << i << " " << i+1 << "\n";
		}
	}
	return 0;
}

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