Submission #914446

#	Time	Username	Problem	Language	Result	Execution time	Memory
914446		Amr	Colors (BOI20_colors)	C++14	0 / 100	0 ms	344 KiB

Colors

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define S second
#define F first
#define all(x) (x).begin(),(x).end()
#define sz size()
#define Yes cout << "YES" << endl
#define No cout << "NO" << endl
#define pb(x) push_back(x);
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const int N=3e5+7;
ll INF=INT_MAX,mod=1e9+7;
int TT=1;
ll power(ll x, unsigned int y)
{
    ll res = 1;
    x = x; // % mod;
    if (x == 0) return 0;
    while (y > 0)
    {
        if (y & 1) res = (res*x)  ; // % mod;
        y = y>>1;
        x = (x*x) ; // % mod;
    }
    return res;
}
void solve()
{
    ll n; cin >> n;
    ll lst = 1,over =n-1;
    cout << "? " << 1 << endl; ll cn; cin >> cn;
    while(1)
    {
        if(lst+over<=n) lst+=over; else lst-=over;
        cout << "? " << lst << endl; cin >> cn;
        if(cn==0) {cout << over+1 << endl; break;}
        over--;
    }
}
int main(){
    //freopen("friday.in","r",stdin);
    //freopen("friday.out","w",stdout);
    fast;
   // cin >> TT;
    while(TT--)
        solve();

    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33