#include "nice_lines.h"
#include <bits/stdc++.h>
using namespace std;
#define ld long double
int n;
void p1() {
int l=-1e4, r=1e4;
while (l<r) {
int mid=(l+r+1)>>1;
ld x=query(0,mid-1);
ld y=query(0,mid);
ld z=query(0,mid+1);
if (x>=y && y<=z) {
r=mid; break;
}
if (x<=y && y<=z) r=mid-1;
else l=mid;
}
int b=r;
l=-1e4, r=1e4;
while (l<r) {
int mid=(l+r+1)>>1;
ld x=query(mid-1,0);
ld y=query(mid,0);
ld z=query(mid+1,0);
if (x>=y && y<=z) {
r=mid; break;
}
if (x<=y && y<=z) r=mid-1;
else l=mid;
}
int a;
if (r) a=-b/r;
else {
if (query(1,1)==0) a=1;
else if (query(1,-1)==0) a=-1;
else a=0;
}
for (int i=1; i<=10; ++i) {
if(query(i,a*i+b)!=0) cerr<<a<<' '<<b<<' '<<i<<' '<<query(i,a*i+b)<<'\n';
}
the_lines_are({a},{b});
}
Compilation message
/usr/bin/ld: /tmp/ccjwXyRd.o: in function `main':
grader.cpp:(.text.startup+0x68): undefined reference to `solve(int, int)'
collect2: error: ld returned 1 exit status
