Submission #828913

#	Time	Username	Problem	Language	Result	Execution time	Memory
828913		Sputnik123	Guess the number (BOI20_guess)	C++17	0 / 100	1 ms	208 KiB

Guess

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <string.h>
#include <stdio.h>
#include <algorithm>
#include <vector>
#include <functional>
#include <cstdio>
#define pb push_back
#define in insert
#define pll pair<ll,ll>
#define vpl vector<pll>
#define vll vector <ll>
#define vl vector<ll>
#define sl set<ll>
#define msl multiset<ll>
#define mll map<ll,ll>
#define mmll multimap<ll,ll>
#define mcl map<char,ll>
#define mp make_pair
#define F first
#define S second
#define all(v) v.begin(),v.end()
#define endl "\n"
#define speed ios_base::sync_with_stdio(false);cin.tie();cout.tie()
#define ll long long
#define ull unsigned long long
#define LMX LLONG_MAX
#define REP(i, n) for (ll i=0;i<(n);i++)
#define FOR(i, a, b) for (ll i = (a); i < (b); ++i)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for (ll i = (b)-1; i >= (a); --i)
#define R0F(i, a) ROF(i, 0, a)
//#define rep(a) F0R(_, a)
#define each(a, x) for (auto &a : x)
using namespace std;
using namespace __gnu_pbds;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ll gcd(ll a,ll b)
{
   if(b==0)
   {
      return a;
   }
   return gcd(b,a%b);
}
ll lcm(ll a,ll b)
{
   return (a/gcd(a,b))*b;
}
bool comp(pair <ll,ll> p1,pair <ll,ll> p2)
{
   if(p1.first==p2.first)
   {
      return p1.second>p2.second;
   }
   return p1.first<p2.first;
}
ll my_abs(ll num)
{
   return abs(static_cast<long long>(num));
}
ll sgn(ll n)
{
   return (n>0)-(n<0);
}
ll binpow(ll a,ll b,ll c)
{
    ll res=1;
    a%=c;
    while(b>0)
    {
        if(b&1)
            res=res*a%c;
        a=a*a%c;
        b>>=1;
    }
    return res;
}
/*
#pragma omp parallel for
#pragma GCC optimize("0fast")
#pragma GCC target ("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")
*/
void solve()
{
    ll n;
    cin>>n;
    ll l=1,r=n;
    while(l<=r)
    {
        ll mid=l+(r-l)/2;
        cout<<"? "<<mid;
        cout<<flush;
        ll s;
        cin>>s;
        if(s==0)
        {
            cout<<"= "<<mid<<flush;
            return ;
        }
        else if(s==-1)
        {
            l=mid+1;
        }
        else
        {
            r=mid-1;
        }
    }
}
int main ()
{
   ll t=1;
   //cin>>t;
   while(t--)
   {
      solve();
   }
}

/*

string
length

*/
/*
    auto locate = [&](int x) -> int {
        for (int i = 0; i < N; i++)
            if (P[i] == x)
                return i;

        return -1;
    };
    function in funcition
*/

• Subtask 1: 0 / 29
• Subtask 2: 0 / 71