#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44
#include <popa.h>
using namespace std;
const int MAXN = 1000;
int l[MAXN + 1], r[MAXN + 1];
int stk[MAXN + 1];
inline int query(int a, int b, int c, int d) {
cout << 0 << " " << a << " " << b << " " << c << " " << d << "\n";
int ans;
cin >> ans;
return ans;
}
inline int solve(int n, int *l, int *r) {
int i;
for(i = 0; i < n; i++) {
l[i] = r[i] = -1;
}
int sz = 0;
for(i = 0; i < n; i++) {
while(sz > 0 && query(i, i, stk[sz], i)) {
if(sz > 1 && query(i, i, stk[sz - 1], i)) {
r[stk[sz - 1]] = stk[sz];
}
else {
l[i] = stk[sz];
}
sz--;
}
stk[++sz] = i;
}
while(sz > 1) {
r[stk[sz - 1]] = stk[sz];
sz--;
}
return stk[1];
}
/*int main() {
//ifstream cin("A.in");
//ofstream cout("A.out");
int i, t;
ios::sync_with_stdio(false);
//cin.tie(0), cout.tie(0);
/cin >> t;
while(t > 0) {
t--;
int n;
cin >> n;
solve(n);
cout << 1 << "\n" << stk[1] << "\n";
for(i = 0; i < n; i++) {
cout << l[i] << " ";
}
cout << "\n";
for(i = 0; i < n; i++) {
cout << r[i] << " ";
}
cout << "\n";
}
//cin.close();
//cout.close();
return 0;
}*/
Compilation message
/tmp/ccf9dwE0.o: In function `main':
grader.cpp:(.text.startup+0xd9): undefined reference to `solve(int, int*, int*)'
collect2: error: ld returned 1 exit status
