| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 699223 |
2023-02-16T06:56:28 Z |
maomao90 |
Colors (BOI20_colors) |
C++17 |
|
1 ms |
208 KB |
// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h>
using namespace std;
#define REP(i, s, e) for (int i = (s); i < (e); i++)
#define RREP(i, s, e) for (int i = (s); i >= (e); i--)
template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;
#ifndef DEBUG
#define cerr if (0) cerr
#endif
const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
ll n;
vll qry;
inline bool ask(ll x) {
cout << "? " << x << endl;
int r; cin >> r;
return r;
}
int main() {
cin >> n;
ll lo = 0, hi = n, mid;
qry.clear();
while (hi - lo > 1) {
mid = lo + hi + 1 >> 1;
qry.pb(mid);
lo = mid;
}
ll lft = LINF, rht = -LINF;
ll d = 0;
REP (i, 0, SZ(qry)) {
if (i & 1 ^ 1) {
d -= qry[i];
} else {
d += qry[i];
}
mnto(lft, d);
mxto(rht, d);
}
ll s = -lft + 1;
assert(s + rht <= n);
ask(s);
lo = 0, hi = n;
bool tog = 0;
while (hi - lo > 1) {
mid = lo + hi + 1 >> 1;
if (!tog) {
s -= mid;
} else {
s += mid;
}
if (s < 1 || s > n) {
break;
}
assert(s >= 1 && s <= n);
tog ^= 1;
bool res = ask(s);
if (res) {
hi = mid;
} else {
lo = mid;
}
}
cout << "= " << hi << endl;
return 0;
}
Compilation message
Colors.cpp: In function 'int main()':
Colors.cpp:51:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
51 | mid = lo + hi + 1 >> 1;
| ~~~~~~~~^~~
Colors.cpp:58:15: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
58 | if (i & 1 ^ 1) {
| ~~^~~
Colors.cpp:72:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
72 | mid = lo + hi + 1 >> 1;
| ~~~~~~~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (3 queries) |
| 2 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 4 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 6 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 8 |
Correct |
1 ms |
208 KB |
OK (6 queries) |
| 9 |
Incorrect |
0 ms |
208 KB |
Wrong guess |
| 10 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (3 queries) |
| 2 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 4 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 6 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 8 |
Correct |
1 ms |
208 KB |
OK (6 queries) |
| 9 |
Incorrect |
0 ms |
208 KB |
Wrong guess |
| 10 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (3 queries) |
| 2 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 4 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 6 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 8 |
Correct |
1 ms |
208 KB |
OK (6 queries) |
| 9 |
Incorrect |
0 ms |
208 KB |
Wrong guess |
| 10 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (3 queries) |
| 2 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 4 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 6 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 8 |
Correct |
1 ms |
208 KB |
OK (6 queries) |
| 9 |
Incorrect |
0 ms |
208 KB |
Wrong guess |
| 10 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
208 KB |
OK (3 queries) |
| 2 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 3 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 4 |
Correct |
0 ms |
208 KB |
OK (6 queries) |
| 5 |
Correct |
0 ms |
208 KB |
OK (5 queries) |
| 6 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 7 |
Correct |
1 ms |
208 KB |
OK (7 queries) |
| 8 |
Correct |
1 ms |
208 KB |
OK (6 queries) |
| 9 |
Incorrect |
0 ms |
208 KB |
Wrong guess |
| 10 |
Halted |
0 ms |
0 KB |
- |
