# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
519745 | Killer2501 | Colors (BOI20_colors) | C++14 | 21 ms | 23872 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define ll long long
#define ld double
#define ull unsigned long long
#define pb push_back
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fi first
#define se second
using namespace std;
const int N = 1e6+5;
const int M = 1e2+2;
const ll base = 1e4;
const ll mod = 998244353;
const int inf = 1e9;
const double ex = 1e-9;
int k, t, n;
int a[N][2], b[N], tong, m, fe[N], dp[N][2];
ll ans, sum[N];
pii val[N][2];
vector<ll> vi, adj[N];
mt19937_64 mt(chrono::steady_clock::now().time_since_epoch().count());
void add(int id, int x)
{
for(; id <= n+1; id += id & -id)fe[id] += x;
}
int get(int id)
{
int res = 0;
for(; id; id -= id & -id)res += fe[id];
return res;
}
int lwr(ll x)
{
return lower_bound(vi.begin(), vi.end(), x) - vi.begin() + 1;
}
void sol(int icase)
{
cin >> n;
ll l = 1, r = n-1, mid;
while(l <= r)
{
mid = (l+r)>>1;
vi.pb(mid);
l = mid+1;
}
m = n;
reverse(vi.begin(), vi.end());
for(ll x: vi)
{
if(t)m += x;
else m -= x;
t ^= 1;
}
l = 1, r = n-1;
cout << "? "<<m << endl;
cin >> k;
while(l <= r)
{
mid = (l+r)>>1;
if(t)m += mid;
else m -= mid;
cout << "? " << m << endl;
cin >> k;
t ^= 1;
if(k)r = mid-1;
else l = mid+1;
}
cout <<"= "<<l<<endl;
}
int main()
{
cin.tie(0);
cout.tie(0);
ios_base::sync_with_stdio(0);
#define task "tests"
if(fopen(task".inp", "r"))
{
freopen(task".inp", "r", stdin);
freopen(task".out", "w", stdout);
}
int test = 1;
//cin >> test;
for(int i = 1; i <= test; i ++)sol(i);
return 0;
}
Compilation message (stderr)
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