#include <bits/stdc++.h>
#define owo(i,a, b) for(int i=(a);i<(b); ++i)
#define uwu(i,a, b) for(int i=(a)-1; i>=(b); --i)
#define senpai push_back
#define ttgl pair<int, int>
#define ayaya cout<<"ayaya~"<<endl
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
gp_hash_table<int, int> mp;
using ll = long long;
using ld = long double;
const ll MOD = 1000000007;
const ll root = 62;
int gcd(int a,int b){return b?gcd(b,a%b):a;}
ll binpow(ll a,ll b){ll res=1;while(b){if(b&1)res=(res*a)%MOD;a=(a*a)%MOD;b>>=1;}return res;}
ll modInv(ll a){return binpow(a, MOD-2);}
const double PI = acos(-1);
const double eps = -1e6;
const int INF = 0x3f3f3f3f;
const int NINF = 0xc0c0c0c0;
const ll INFLL = 0x3f3f3f3f3f3f3f3f;
const ll NINFLL = 0xc0c0c0c0c0c0c0c0;
//write a as power of 4, binary search down and compare at the end;
/*bool stuff[4097][10241];
int idx1;
int idx2;
int num;
void bit_set(int a) {
idx1++;
stuff[num][a] = true;
}
int bit_get(int a) {
idx2++;
return stuff[num][a];
}*/
int fours[6] = {1, 4, 16, 64, 256, 1024};
void remember(int a) {
owo(i, 0, 6) {
bit_set(a);
a/=4;
}
}
int compare(int b) {
int l = 0;
int r = 5;
while(l<r) {
int mid = (l+r)/2;
if(bit_get(b/fours[mid]))r = mid;
else l = mid+1;
}
if(l==0)return 0;
int curr = b/fours[l];
int diff = (b/fours[l-1]-(4*curr));
if(diff==0) {
return -1;
}else if(diff==3) {
return 1;
}else if(diff==1) {
if(bit_get(curr*fours[l]))return 1;
else return -1;
}else {
if(bit_get(curr*fours[l]+3))return -1;
else return 1;
}
}
/*int main() {
//freopen("file.in", "r", stdin);
//freopen("file.out", "w", stdout);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
cin.tie(0)->sync_with_stdio(0);
int n, m;
cin>>n>>m;
remember(n);
cout<<compare(m)<<" "<<idx1<<" "<<idx2<<"\n";
return 0;
}
*/
Compilation message
cmp.cpp: In function 'void remember(int)':
cmp.cpp:41:9: error: 'bit_set' was not declared in this scope
bit_set(a);
^~~~~~~
cmp.cpp:41:9: note: suggested alternative: 'tzset'
bit_set(a);
^~~~~~~
tzset
cmp.cpp: In function 'int compare(int)':
cmp.cpp:50:12: error: 'bit_get' was not declared in this scope
if(bit_get(b/fours[mid]))r = mid;
^~~~~~~
cmp.cpp:61:12: error: 'bit_get' was not declared in this scope
if(bit_get(curr*fours[l]))return 1;
^~~~~~~
cmp.cpp:64:12: error: 'bit_get' was not declared in this scope
if(bit_get(curr*fours[l]+3))return -1;
^~~~~~~
cmp.cpp:67:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
