#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
#include <unordered_map>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFOR(i,start,end) for(int i = start; i>end; i--)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define all(a) a.begin(), a.end()
#define mt make_tuple
#define v vector
#define sf scanf
#define pf printf
#define dvar(x) cout << #x << " := " << x << "\n"
#define darr(x,n) FOR(i,0,n) cout << #x << "[" << i << "]" << " := " << x[i] << "\n"
typedef long long ll;
typedef long double ld;
typedef pair<int, int > pii;
typedef pair<ll, ll> pll;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> void minn(T &a, T b) { a = min(a, b); }
template<class T> void maxx(T &a, T b) { a = max(a, b); }
inline void io() {
#ifdef LOCAL_PROJECT
freopen("input.in", "r", stdin); freopen("output.out", "w", stdout);
#else
/* online submission */
#endif
ios_base::sync_with_stdio(false); cin.tie(NULL);
}
/**************************COCI 2016-2017 R7 P4*************************/
int __builtin_clz(int x) { // #0s at beginning
RFORE(i, 31, 0)
if (((1 << i)&x) != 0) {
return 31 - i;
}
return 32;
}
struct BitNum{
int num, bits;
int len;
BitNum(int x, int b) {
num = x, bits = b;
len = 32 - __builtin_clz(x);
}
int totalLen() const {
return bits + len;
}
int top32() const {
return num << (32 - len);
}
bool operator<(BitNum const &other) const {
if (totalLen() < other.totalLen()) return 1;
else if (totalLen() > other.totalLen()) return 0;
else return top32() < other.top32();
}
string toString() {
string ret = "";
RFORE(i, len - 1, 0)
ret += ((num&(1 << i)) > 0 ? '1' : '0');
FOR(i, 0, bits)
ret += '0';
return ret;
}
};
int N, C[1000000][2];
BitNum maxb(0, 0);
void dfs(int x, int dep) {
if (x < 0) {
maxx(maxb, BitNum(-x, dep));
return;
}
dfs(C[x][0], dep + 1), dfs(C[x][1], dep + 1);
}
int main() {
io();
cin >> N;
FORE(i, 1, N) cin >> C[i][0] >> C[i][1];
dfs(1, 0);
cout << maxb.toString() << "\n";
return 0;
}
Compilation message
poklon.cpp: In function 'int __builtin_clz(int)':
poklon.cpp:38:5: warning: new declaration 'int __builtin_clz(int)' ambiguates built-in declaration 'int __builtin_clz(unsigned int)' [-Wbuiltin-declaration-mismatch]
int __builtin_clz(int x) { // #0s at beginning
^~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
448 KB |
Output is correct |
| 4 |
Correct |
2 ms |
464 KB |
Output is correct |
| 5 |
Correct |
2 ms |
464 KB |
Output is correct |
| 6 |
Correct |
2 ms |
652 KB |
Output is correct |
| 7 |
Correct |
2 ms |
656 KB |
Output is correct |
| 8 |
Correct |
2 ms |
664 KB |
Output is correct |
| 9 |
Correct |
2 ms |
664 KB |
Output is correct |
| 10 |
Correct |
2 ms |
664 KB |
Output is correct |
| 11 |
Correct |
5 ms |
748 KB |
Output is correct |
| 12 |
Correct |
5 ms |
764 KB |
Output is correct |
| 13 |
Correct |
17 ms |
1608 KB |
Output is correct |
| 14 |
Correct |
30 ms |
2572 KB |
Output is correct |
| 15 |
Correct |
31 ms |
2572 KB |
Output is correct |
| 16 |
Correct |
103 ms |
5776 KB |
Output is correct |
| 17 |
Correct |
236 ms |
11984 KB |
Output is correct |
| 18 |
Correct |
239 ms |
13016 KB |
Output is correct |
| 19 |
Correct |
295 ms |
13016 KB |
Output is correct |
| 20 |
Correct |
305 ms |
40108 KB |
Output is correct |
