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QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #560185 | #9250. Max GCD | duckindog | Compile Error | / | / | C++23 | 2.1kb | 2024-09-12 14:05:36 | 2024-09-12 14:05:37 |
Judging History
answer
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,tune=native")
#include <bits/stdc++.h>
using namespace std;
const int N = 150'000 + 10,
MAX = 1'000'000;
int n, q;
int a[N];
struct Query {
int l, r, idx;
friend istream& operator >> (istream& is, auto& rhs) {
return is >> rhs.l >> rhs.r;
}
} query[N];
int answer[N];
vector<int> pos[MAX + 10];
vector<pair<int, int>> save[N];
int bit[N];
void upd(int i, int x) {
for (; i <= n; i += i & -i) bit[i] = max(bit[i], x);
}
int que(int i) {
int ret = 0;
for (; i; i -= i & -i) ret = max(ret, bit[i]);
return ret;
}
int32_t main() {
cin.tie(0)->sync_with_stdio(0);
cin >> n >> q;
for (int i = 1; i <= n; ++i) cin >> a[i];
for (int i = 1; i <= q; ++i) cin >> query[i], query[i].idx = i;
for (int i = 1; i <= n; ++i) pos[a[i]].push_back(i);
{ //init
set<pair<int, int>> s;
for (int value = MAX; value >= 1; --value) {
vector<int> totalPos;
for (int multiple = value; multiple <= MAX; multiple += value) {
for (const auto& x : pos[multiple]) totalPos.push_back(x);
}
if (totalPos.size() <= 2) continue;
sort(totalPos.begin(), totalPos.end());
for (const auto& x : totalPos) {
if (x == totalPos[0] || x == totalPos.back()) continue;
int l = *(lower_bound(totalPos.begin(), totalPos.end(), x) - 1),
r = lower_bound(totalPos.begin(), totalPos.end(), 2 * x - l) - totalPos.begin();
if (r == totalPos.size()) continue;
r = totalPos[r];
if (!s.count({l, r})) {
s.insert({l, r});
save[l].push_back({r, value});
}
}
}
}
sort(query + 1, query + q + 1, [&](const auto& a, const auto& b) { return a.l < b.l; });
int it = n;
for (int i = q; i >= 1; --i) {
const auto& [l, r, idx] = query[i];
while (it >= l)
for (const auto& [r, value] : save[it--]) upd(r, value);
answer[idx] = que(r);
}
for (int i = 1; i <= q; ++i) cout << answer[i] << "\n";
cerr << 1.0 * clock() / CLOCKS_PER_SEC << "\n";
}
Details
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/gthr.h:148,
from /usr/include/c++/13/ext/atomicity.h:35,
from /usr/include/c++/13/bits/ios_base.h:39,
from /usr/include/c++/13/streambuf:43,
from /usr/include/c++/13/bits/streambuf_iterator.h:35,
from /usr/include/c++/13/iterator:66,
from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:54,
from answer.code:3:
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:102:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
102 | __gthrw(pthread_once)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:102:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:103:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
103 | __gthrw(pthread_getspecific)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:103:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:104:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
104 | __gthrw(pthread_setspecific)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:104:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:106:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
106 | __gthrw(pthread_create)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:106:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:107:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
107 | __gthrw(pthread_join)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:107:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:108:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
108 | __gthrw(pthread_equal)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:108:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:109:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
109 | __gthrw(pthread_self)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:109:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:110:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
110 | __gthrw(pthread_detach)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:110:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:112:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
112 | __gthrw(pthread_cancel)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:112:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:114:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
114 | __gthrw(sched_yield)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:114:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:116:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
116 | __gthrw(pthread_mutex_lock)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:116:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:117:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
117 | __gthrw(pthread_mutex_trylock)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:117:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:119:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
119 | __gthrw(pthread_mutex_timedlock)
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:119:1: error: attribute value ‘tune=native’ was already specified in ‘target’ attribute
/usr/include/x86_64-linux-gnu/c++/13/bits/gthr-default.h:121:1: error: attribute value ‘t...