#include <bits/stdc++.h>
#include "coins.h"
using namespace std;
#define fi first
#define se second
#define all(a) a.begin(),a.end()
#define pb push_back
const int maxn = 2e5+1;
vector <int> coin_flips(vector <int> b, int c){
vector <int> d;
for(int i = 0;i < b.size();i++){
if(b[i] == 1 && i != c)d.push_back(i);
}
if(b[c] == 0)d.push_back(c);
if(d.empty()){
d.push_back(1);
d.push_back(1);
}
return d;
}
int find_coin(vector <int> b){
int c = -1;
for(int i = 0;i < b.size();i++){
if(b[i])c = i;
}
return c;
}
