結果
| 問題 |
No.2929 Miracle Branch
|
| コンテスト | |
| ユーザー |
Tatsu_mr
|
| 提出日時 | 2024-10-13 14:11:55 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 5,022 bytes |
| コンパイル時間 | 3,093 ms |
| コンパイル使用メモリ | 260,704 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-10-13 14:12:10 |
| 合計ジャッジ時間 | 14,122 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 42 WA * 1 |
ソースコード
#include <bits/stdc++.h>
#define For(i, a, b) for(long long i = a; i < b; i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(long long i = a; i >= b; i--)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()
using namespace std;
using lint = long long;
using ld = long double;
namespace fastprime {
template <class T>
T modpow(T a, T b, T mod) {
T cur = a % mod, res = 1 % mod;
while (b) {
if (b & 1) {
res = (res * cur) % mod;
}
cur = (cur * cur) % mod;
b >>= 1;
}
return res;
}
bool MillerRabin(long long n) {
if (n <= 1) {
return false;
}
if (n == 2 || n == 7 || n == 61) {
return true;
}
if (n % 2 == 0) {
return false;
}
vector<long long> A;
if (n < 4759123141) {
A = {2, 7, 61};
} else {
A = {2, 325, 9375, 28178, 450775, 9780504, 1795265022};
}
long long s = 0, d = n - 1;
while (d % 2 == 0) {
s++;
d >>= 1;
}
for (auto a : A) {
if (a % n == 0) {
return true;
}
long long x = modpow<__int128_t>(a, d, n);
if (x == 1) {
continue;
}
bool ok = false;
for (int i = 0; i < s; i++) {
if (x == n - 1) {
ok = true;
break;
}
x = (__int128_t)x * x % n;
}
if (!ok) {
return false;
}
}
return true;
}
long long gcd(long long x, long long y) {
if (y == 0) {
return x;
}
return gcd(y, x % y);
}
unsigned int xorshift() {
static unsigned int x = 123456789, y = 362436069, z = 521288629, w = 88675123;
unsigned int t = (x ^ (x << 11));
x = y;
y = z;
z = w;
return (w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)));
}
long long Pollard(long long n) {
if (n % 2 == 0) {
return 2LL;
}
if (MillerRabin(n)) {
return n;
}
long long i = 0;
while (true) {
i++;
long long r = xorshift();
auto f = [&](long long x) {
return (__int128_t(x) * x + r) % n;
};
long long x = i, y = f(x);
while (true) {
long long p = gcd(abs(y - x + n), n);
if (p == 0 || p == n) {
break;
}
if (p != 1) {
return p;
}
x = f(x);
y = f(f(y));
}
}
}
vector<long long> prime_factorize(long long n) {
if (n == 1) {
return {};
}
long long p = Pollard(n);
if (p == n) {
return {p};
}
vector<long long> l = prime_factorize(p);
vector<long long> r = prime_factorize(n / p);
for (auto x : r) {
l.emplace_back(x);
}
sort(l.begin(), l.end());
return l;
}
vector<long long> divisors(long long n) {
if (n == 1) {
return {1LL};
}
auto divisor_dfs = [&](auto divisor_dfs, vector<pair<long long, long long>> &p, long long t, int cur, vector<long long> &res) -> void {
if (cur == p.size()) {
res.emplace_back(t);
return;
}
divisor_dfs(divisor_dfs, p, t, cur + 1, res);
for (int i = 0; i < p[cur].second; i++) {
t *= p[cur].first;
divisor_dfs(divisor_dfs, p, t, cur + 1, res);
}
};
vector<long long> res, pf = prime_factorize(n);
vector<pair<long long, long long>> p;
long long cnt = 1, now = pf[0];
for (int i = 1; i < (int)pf.size(); i++) {
if (pf[i] == now) {
cnt++;
} else {
p.emplace_back(now, cnt);
now = pf[i];
cnt = 1;
}
}
p.emplace_back(now, cnt);
divisor_dfs(divisor_dfs, p, 1, 0, res);
sort(res.begin(), res.end());
return res;
}
} // namespace fastprime
using namespace fastprime;
int main() {
lint x;
cin >> x;
if (x == 1) {
cout << 2 << endl << "1 2" << endl << "b g" << endl;
return 0;
}
auto ps = prime_factorize(x);
lint cnt_2 = 0;
for (auto p : ps) {
if (p == 2) {
cnt_2++;
}
}
vector<lint> ans;
rep(i, cnt_2 % 2) {
ans.emplace_back(2);
}
rep(i, cnt_2 / 2) {
ans.emplace_back(4);
}
for (auto p : ps) {
if (p > 2) {
ans.emplace_back(p);
}
}
lint n = accumulate(ALL(ans), 0LL) + (lint)ans.size();
if (n > 200000) {
cout << -1 << endl;
return 0;
}
cout << n << endl;
vector<char> col(n + 1);
For(i, 1, (lint)ans.size()) {
cout << i << " " << i + 1 << endl;
col[i] = 'b';
col[i + 1] = 'b';
}
lint cur = ans.size();
rep(i, (lint)ans.size()) {
rep(_, ans[i]) {
cur++;
cout << i + 1 << " " << cur << endl;
col[cur] = 'g';
}
}
For(i, 1, n + 1) {
cout << col[i] << " ";
}
cout << endl;
}
Tatsu_mr