#include <bits/stdc++.h>
#include "rail.h"
using namespace std;
typedef int64_t ll;
#ifdef MINA
int getDistance(int i, int j) {
cout << i << ' ' << j << endl;
int x;
cin >> x;
return x;
}
#endif
void findLocation(int n, int first, int location[], int stype[]) {
location[0] = first, stype[0] = 1;
if (n == 1) return;
for (int i = 1; i < n; i++) {
int x = getDistance(0, i), x2 = getDistance(i, 0);
assert(x > 0), assert(x2 > 0);
if (x2 == x) {
location[i] = first + x;
stype[i] = 2;
} else {
assert(x2 < x);
location[i] = first - x2;
stype[i] = 1;
}
}
for (int i = 0; i < n; i++) {
assert(location[i] > 0);
assert(stype[i] == 1 || stype[i] == 2);
if (stype[i] == 2) assert(location[i] > first);
if (stype[i] == 1) assert(location[i] <= first);
}
}
