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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#222717 | #5503. Euclidean Algorithm | ucup-team859# | WA | 331ms | 4432kb | C++23 | 3.6kb | 2023-10-21 18:04:10 | 2023-10-21 18:04:11 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
using ll = long long;
using ull = unsigned long long;
string to_string(const string &s) {
return '"' + s + '"';
}
string to_string(bool b) {
return b ? "true" : "false";
}
template <typename A, typename B>
string to_string(const pair<A, B> &p) {
return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}
template <typename T>
string to_string(const T &v) {
string s = "{";
bool first = true;
for (const auto &it : v) {
if (!first)
s += ", ";
else
first = false;
s += to_string(it);
}
return s += "}";
}
void debug_out() {
cerr << endl;
}
template <typename T, typename... Args>
void debug_out(const T &first, const Args&... rest) {
cerr << to_string(first) << " ";
debug_out(rest...);
}
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
auto startTime = high_resolution_clock::now();
int get_time() {
auto stopTime = chrono::high_resolution_clock::now();
auto duration = duration_cast<milliseconds>(stopTime - startTime);
return duration.count(); // in ms
}
int generate(int x, int y) {
int gc = __gcd(x, y);
map<int, int> f;
f[x] = f[y] = 1;
vector<int> v;
v.push_back(x);
v.push_back(y);
int steps = 100, last = 100;
int lim = 10 * max(x, y);
while (last > 0) {
--last;
int x = v[rng() % v.size()];
int y = v[rng() % v.size()];
if (x == y)
continue;
if (2LL * x - y <= lim && 2LL * x - y >= gc && !f.count(2LL * x - y)) {
v.push_back(2LL * x - y);
last = 100;
f[2LL * x - y] = 1;
}
swap(x, y);
if (2LL * x - y <= lim && 2LL * x - y >= gc && !f.count(2LL * x - y)) {
v.push_back(2LL * x - y);
last = 100;
f[2LL * x - y] = 1;
}
if (f.count(gc))
return 1;
}
return f.count(gc) > 0;
}
int nrdiv(int x) {
int nr = 0;
for (int i = 1; i <= x; ++i) {
if (x % i == 0)
++nr;
}
return nr;
}
const int sz = 316250;
vector <int> maxPrim;
void computeCiur() {
maxPrim.resize(sz + 1);
for (int i = 1; i <= sz; ++i)
maxPrim[i] = 0;
for (int i = 2; i <= sz; i++) {
if (maxPrim[i] != 0) {
continue;
}
for (int j = i; j <= sz; j += i) {
maxPrim[j] = i;
}
}
}
int nrdiv_optim(int n) {
if (n == 0)
return 0;
int frecv = 0, currPrim = -1, ans = 1;
while (n != 1) {
if (maxPrim[n] != currPrim) {
ans *= (frecv + 1);
frecv = 0;
}
currPrim = maxPrim[n];
frecv++;
n /= maxPrim[n];
}
ans *= (frecv + 1);
return ans;
}
ll get_div_interval(int n) {
int r = sqrt(n);
ll sum = 0;
int last = n;
for (int j = 1; j <= r; ++j) {
int r = n / j;
int l = n / (j + 1) + 1;
last = l;
// cout << n << " " << l << " " << r << " " << j << endl;
sum += 1LL * j * (r - l + 1);
}
for (int j = 1; j < last; ++j)
sum += n / j;
return sum;
}
void solve() {
int n;
cin >> n;
ll sum = 0;
int r = sqrt(n);
for (int i = 1; i <= r; ++i) {
sum += get_div_interval(n / i - 1);
}
for (int i = 1; i <= r; ++i) {
sum += nrdiv_optim(i - 1) * (n / i - r);
}
cout << sum << endl;
}
int main() {
cin.tie(NULL);
ios_base::sync_with_stdio(false);
computeCiur();
int t = 1;
cin >> t;
while (t--)
solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 4352kb
input:
3 2 5 14
output:
1 9 62
result:
ok 3 lines
Test #2:
score: -100
Wrong Answer
time: 331ms
memory: 4432kb
input:
3 29107867360 65171672278 41641960535
output:
526529808500 526529808500 526529808500
result:
wrong answer 1st lines differ - expected: '8921593237533', found: '526529808500'