#include <bits/stdc++.h>
#define pb push_back
#include "prize.h"
using namespace std;
/*
static const int max_q = 10000;
static int n;
static int query_count = 0;
static vector<int> g;
static vector<vector<int> > rank_count;
vector<int> ask(int i) {
query_count++;
if(query_count > max_q) {
cerr << "Query limit exceeded" << endl;
//cout<<query_count<<" babag "<<endl;
exit(0);
}
if(i < 0 || i >= n) {
cerr << "Bad index: " << i << endl;
exit(0);
}
vector<int> res(2);
res[0] = rank_count[g[i] - 1][i + 1];
res[1] = rank_count[g[i] - 1][n] - res[0];
return res;
}
*/
const int MAXN = 2e5 + 5;
vector<vector<int> > check(MAXN, vector<int>(2, -1));
vector<int> small(MAXN);
void f(int n, int smallcnt, int l, int r, int cnt){
if(l == r){
small[l] = 1;
return;
}
int mid = (l + r)/2;
int m = -1;
int k = rand() % 23;
if(k >= 21){
vector<int> delts;
for(int i = l; i <= r; i++){
delts.pb(i);
}
random_shuffle(delts.begin(), delts.end());
for(int i = 0; i < delts.size(); i++){
if(check[delts[i]][0] == -1) check[delts[i]] = ask(delts[i]);
if(check[delts[i]][0] + check[delts[i]][1] == smallcnt){
m = delts[i];
break;
}
else{
small[delts[i]] = 1;
}
}
}
else{
for(int delt = 0; delt <= (r - l + 1)/2 + 1; delt++){
if(mid + delt <= r){
if(check[mid + delt][0] == -1) check[mid + delt] = ask(mid + delt);
if(check[mid + delt][0] + check[mid + delt][1] == smallcnt){
m = mid + delt;
break;
}
else{
small[mid + delt] = 1;
}
}
if(mid - delt >= l){
if(check[mid - delt][0] == -1) check[mid - delt] = ask(mid - delt);
if(check[mid - delt][0] + check[mid - delt][1] == smallcnt){
m = mid - delt;
break;
}
else{
small[mid - delt] = 1;
}
}
}
}
if(m == -1) return; // aralıktaki herkes small ve tagledik
if(l > 0 && check[l-1][0] == -1) check[l-1] = ask(l-1);
if(r < n-1 && check[r+1][0] == -1) check[r+1] = ask(r+1);
int solcnt = check[m][0] - (l > 0 ? check[l-1][0] : 0);
int sagcnt = check[m][1] - (r < n-1 ? check[r+1][1] : 0);
if(l <= m-1 && solcnt > 0){
//cout<<l<<" - "<<m-1<<" -> "<<solcnt<<endl;
f(n, smallcnt, l, m-1, solcnt);
}
if(m+1 <= r && sagcnt > 0){
//cout<<m+1<<" - "<<r<<" -> "<<sagcnt<<endl;
f(n, smallcnt, m+1, r, sagcnt);
}
}
long long kokbul(long long n){
long long l = 1, r = n;
while(l < r){
long long m = (l + r)/2;
if(m * m < n) l = m + 1;
else r = m;
}
return l;
}
int find_best(int n) {
int smallcnt = 0;
int kok = kokbul(n) + 15;
kok = min(kok, n);
for(int i = 0; i < kok; i++){
check[i] = ask(i);
smallcnt = max(smallcnt, check[i][0] + check[i][1]);
}
for(int i = 0; i < kok; i++){
if(check[i][0] + check[i][1] < smallcnt) small[i] = 1;
}
f(n, smallcnt, 0, n-1, smallcnt);
int ans = -1;
for(int i = 0; i < n; i++){
if(small[i] == 1){
if(check[i][0] == -1) check[i] = ask(i);
if(check[i][0] + check[i][1] == 0){
ans = i;
}
}
}
return 0;
}
/*
int main() {
cin>>n;
g.resize(n);
for(int i = 0; i < n; i++) {
cin>>g[i];
if(g[i] < 1) {
cerr << "Invalid rank " << g[i] << " at index " << i << endl;
exit(0);
}
}
int max_rank = *max_element(g.begin(), g.end());
rank_count.resize(max_rank + 1, vector<int>(n + 1, 0));
for(int r = 0; r <= max_rank; r++) {
for(int i = 1; i <= n; i++) {
rank_count[r][i] = rank_count[r][i - 1];
if(g[i - 1] == r)
rank_count[r][i]++;
}
}
for(int i = 0; i <= n; i++)
for(int r = 1; r <= max_rank; r++)
rank_count[r][i] += rank_count[r - 1][i];
int res = find_best(n);
cout << res << endl << "Query count: " << query_count << endl;
return 0;
}
*/
/*
int main() {
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int mx = 0;
int t;
cin>>t;
while(t--){
//cin>>n;
//n = rng() % 55 + 7;
n = 2e5 - rng() % 5000;
g.resize(n);
vector<int> cnts(3);
cnts[0] = 1;
cnts[1] = 3;
cnts[2] = rng()%10 + 10;
cnts[3] = rng()%20 + 400;
cnts[4] = n - cnts[3] - cnts[2] - cnts[1] - cnts[0];
for(int i = 0; i < n; i++){
small[i] = 0;
check[i][0] = check[i][1] = -1;
}
int ind = 0;
for(int i = 0; i < n; i++){
if(cnts[ind] == 0) ind++;
g[i] = ind + 1;
cnts[ind]--;
}
shuffle(g.begin(), g.end(), rng);
for(int i = 0; i < n; i++) {
if(g[i] < 1) {
cerr << "Invalid rank " << g[i] << " at index " << i << endl;
exit(0);
}
}
int max_rank = *max_element(g.begin(), g.end());
rank_count.clear();
rank_count.resize(max_rank + 1, vector<int>(n + 1, 0));
for(int r = 0; r <= max_rank; r++) {
for(int i = 1; i <= n; i++) {
rank_count[r][i] = rank_count[r][i - 1];
if(g[i - 1] == r)
rank_count[r][i]++;
}
}
for(int i = 0; i <= n; i++)
for(int r = 1; r <= max_rank; r++)
rank_count[r][i] += rank_count[r - 1][i];
int res = find_best(n);
if(res == -1 || query_count > max_q){
cout << res << endl << "Query count: " << query_count << endl;
}
mx = max(mx, query_count);
query_count = 0;
}
cout<<mx<<endl;
return 0;
}*/
Compilation message
prize.cpp: In function 'void f(int, int, int, int, int)':
prize.cpp:52:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | for(int i = 0; i < delts.size(); i++){
| ~~^~~~~~~~~~~~~~
prize.cpp: In function 'int find_best(int)':
prize.cpp:132:8: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
132 | int ans = -1;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
18 ms |
12176 KB |
answer is not correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
18 ms |
12112 KB |
answer is not correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
