//#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
#define debug(s) cout<< #s <<" = "<< s <<endl
#define all(v) (v).begin(), (v).end()
#define KeepUnique(v) (v).erase( unique(all(v)), v.end() )
#define MEMSET(a,val) memset(a, val, sizeof a)
#define PB push_back
#define endl '\n'
inline int myrand(int l, int r) {
int ret = rand(); ret <<= 15; ret ^= rand();
if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
return ret;
}
template <typename F, typename S>
ostream& operator << (ostream& os, const pair< F, S>& p) {
return os<<"(" <<p.first<<", "<<p.second<<")";
}
const int maxn = 200010;
vector<int> memo[maxn];
int Left(int i) {
if(memo[i].empty()) memo[i] = ask(i);
return memo[i][0];
}
int Right(int i) {
if(memo[i].empty()) memo[i] = ask(i);
return memo[i][1];
}
int Total(int i) {
if(memo[i].empty()) memo[i] = ask(i);
return memo[i][0] + memo[i][1];
}
int find_best(int n) {
if(n <= 5000) { // fix
for(int i = 0; i < n; i++) {
if(Total(i) == 0) {
return i;
}
}
}
int mx_tot = 0;
for(int i = 0; i < 500; i++) { // fix
mx_tot = max(mx_tot, Total(i));
}
int now = 0;
while(true) {
int ret;
if(Total(now) == mx_tot) {
ret = now;
} else {
int lo = now, hi = n - 1;
while(lo <= hi) {
int mid = lo + hi >> 1;
bool IsGold = ((Total(mid) < mx_tot) or (Left(mid) - Left(now) > 0));
if(IsGold) {
ret = mid;
hi = mid - 1;
} else {
lo = mid + 1;
}
}
}
if(Total(now) == 0) return now;
now = ret + 1;
}
assert(false);
return 0;
}
Compilation message
prize.cpp: In function 'int myrand(int, int)':
prize.cpp:17:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
^~
prize.cpp:17:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
if(ret < 0) ret = -ret; ret %= (r-l+1); ret += l;
^~~
prize.cpp: In function 'int find_best(int)':
prize.cpp:63:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid = lo + hi >> 1;
~~~^~~~
prize.cpp:74:7: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
now = ret + 1;
~~~~^~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
88 ms |
5240 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
58 ms |
5448 KB |
Incorrect |
| 2 |
Halted |
0 ms |
0 KB |
- |
