結果
| 問題 |
No.1255 ハイレーツ・オブ・ボリビアン
|
| コンテスト | |
| ユーザー |
SSRS
|
| 提出日時 | 2020-10-09 21:53:16 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 33 ms / 2,000 ms |
| コード長 | 1,147 bytes |
| コンパイル時間 | 2,017 ms |
| コンパイル使用メモリ | 199,224 KB |
| 最終ジャッジ日時 | 2025-01-15 04:31:46 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 15 |
コンパイルメッセージ
In file included from /usr/include/c++/13/istream:41,
from /usr/include/c++/13/sstream:40,
from /usr/include/c++/13/complex:45,
from /usr/include/c++/13/ccomplex:39,
from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:127,
from main.cpp:1:
In member function ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]’,
inlined from ‘int main()’ at main.cpp:64:15:
/usr/include/c++/13/ostream:204:25: warning: ‘ans’ may be used uninitialized [-Wmaybe-uninitialized]
204 | { return _M_insert(__n); }
| ~~~~~~~~~^~~~~
main.cpp: In function ‘int main()’:
main.cpp:57:17: note: ‘ans’ was declared here
57 | long long ans;
| ^~~
ソースコード
#include <bits/stdc++.h>
using namespace std;
long long MOD;
long long modpow(long long a, long long b){
long long ans = 1;
while (b > 0){
if (b % 2 == 1){
ans *= a;
ans %= MOD;
}
a *= a;
a %= MOD;
b /= 2;
}
return ans;
}
int euler_phi(int N){
vector<int> pf;
int ans = N;
for (int j = 2; j * j <= N; j++){
if (N % j == 0){
ans /= j;
ans *= j - 1;
while (N % j == 0){
N /= j;
}
}
}
if (N != 1){
ans /= N;
ans *= N - 1;
}
return ans;
}
int main(){
int T;
cin >> T;
for (int i = 0; i < T; i++){
int N;
cin >> N;
if (N == 1){
cout << 1 << endl;
} else {
int M = N * 2 - 1;
MOD = M;
int F = euler_phi(M);
vector<int> fact;
for (int j = 1; j * j <= F; j++){
if (F % j == 0){
fact.push_back(j);
if (j * j < F){
fact.push_back(F / j);
}
}
}
sort(fact.begin(), fact.end());
long long ans;
for (int x : fact){
if (modpow(2, x) == 1){
ans = x;
break;
}
}
cout << ans << endl;
}
}
}
SSRS