Submission #932873

#	Time	Username	Problem	Language	Result	Execution time	Memory
932873		De3b0o	Mađioničar (COI22_madionicar)	C++14	0 / 100	1012 ms	416 KiB

Main

#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
#define in insert
#define er erase
#define pb push_back
#define ppb pop_back()
#define ph push
#define pp pop()
#define d3 ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define cans cout << ans << "\n";
#define yes cout << "YES" << "\n";
#define no cout << "NO" << "\n";
#define pll pair<ll,ll>
#define lin cout << "\n";
#define sqr 340
#define mod 1000000007
#define mid (l+r)/2

using namespace std;

ll fp(ll x , ll y)
{
    if(y==0)
        return 1;
    ll z = fp(x,y/2);
    if(y&1)
        return z*z*x;
    else
        return z*z;
}

int sqrot(ll x)
{
    int l = 0 , r = INT_MAX;
    while(l<=r)
    {
        if(mid*mid>=x)
            r=mid-1;
        else
            l=mid+1;
    }
    return r+1;
}

ll cel(ll x , ll y)
{
    return x/y + bool(x/y);
}

string tb(ll x)
{
    string s = "";
    while(x>0)
    {
        if(x&1)
            s+='1';
        else
            s+='0';
        x/=2;
    }
    while(s.size()<60)
        s+='0';
    return s;
}

ll fb(string s)
{
    ll x = 0;
    ll c = 1;
    for(int8_t i = 0 ; 60>i ; i++)
    {
        if(s[i]=='1')
            x+=c;
        c*=2;
    }
    return x;
}

int main()
{
    ll n;
    cin >> n;
    ll l = 0 , r = n/2 +n%2 -1;
    ll ans;
    while(l<=r)
    {
        ll x = 2*mid+1;
        bool l1 = 0;
        for(int i = 0 ; n-x+1>i ; i++)
        {
            cout << "? " << i+1 << " " << i+x  << "\n";
            ll e;
            cin >> e;
            if(e)
            {
                l1=1;
                break;
            }
        }
        if(l1)
            l=mid+1;
        else
            r=mid-1;
    }
    ans=2*(l-1)+1;
    l = 1 , r = n/2;
    while(l<=r)
    {
        ll x = 2*mid;
        if(x<ans)
        {
            l=mid+1;
            continue;
        }
        bool l1 = 0;
        for(int i = 0 ; n-x+1>i ; i++)
        {
            cout << "? " << i+1 << " " << i+x  << "\n";
            ll e;
            cin >> e;
            if(e)
            {
                l1=1;
                break;
            }
        }
        if(l1)
            l=mid+1;
        else
            r=mid-1;
    }
    if(l!=0)
        ans=max(ans,2*(l-1));
    cout << "! " << ans << "\n";
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 37