#include <bits/stdc++.h>
#include "popa.h"
using namespace std;
template<class T, class U>
void ckmin(T &a, U b)
{
if (a > b) a = b;
}
template<class T, class U>
void ckmax(T &a, U b)
{
if (a < b) a = b;
}
#define MP make_pair
#define PB push_back
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define FOR(i, a, b) for (auto i = (a); i < (b); i++)
#define FORD(i, a, b) for (auto i = (a) - 1; i >= (b); i--)
#define SZ(x) ((int) ((x).size()))
#define ALL(x) (x).begin(), (x).end()
#define INF 1000000007
#define LLINF 2696969696969696969ll
#define MAXN 1013
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vpi;
typedef vector<pll> vpl;
int N;
int ia[MAXN];
int gcd(int a, int b)
{
return (b == 0 ? a : gcd(b, a % b));
}
// bool query(int a, int b, int c, int d)
// {
// int ga = 0, gb = 0;
// FOR(i, a, b + 1) ga = gcd(ga, ia[i]);
// FOR(i, c, d + 1) gb = gcd(gb, ia[i]);
// return (ga == gb);
// }
int solve(int n, int *lt, int *rt)
{
N = n;
FOR(i, 0, N)
{
lt[i] = rt[i] = -1;
}
int root = 0;
FOR(i, 1, N)
{
vi chain;
chain.PB(root);
while(rt[chain.back()] != -1)
{
chain.PB(rt[chain.back()]);
}
// for (int x : chain)
// {
// cerr << x << ' ';
// }
// cerr << endl;
//try to insert it as low as you can.
while(!chain.empty())
{
int u = chain.back();
if (query(u, i, u, u))
{
lt[i] = rt[u];
rt[u] = i;
break;
}
chain.pop_back();
}
if (chain.empty())
{
lt[i] = root;
root = i;
}
}
return root;
}
// int32_t main()
// {
// ios_base::sync_with_stdio(0); cin.tie(0);
// int n; cin >> n;
// FOR(i, 0, n) cin >> ia[i];
// int ls[n + 1], rs[n + 1];
// int r = solve(n, ls, rs);
// cout << "root at " << r << '\n';
// FOR(i, 0, n)
// {
// if (ls[i] != -1)
// {
// cout << i << " -> " << ls[i] << endl;
// }
// if (rs[i] != -1)
// {
// cout << i << " -> " << rs[i] << endl;
// }
// }
// return 0;
// }
Compilation message
/tmp/cca3occ1.o: In function `gcd(int, int)':
popa.cpp:(.text+0x0): multiple definition of `gcd(int, int)'
/tmp/ccJG9kQo.o:grader.cpp:(.text+0x20): first defined here
collect2: error: ld returned 1 exit status
