結果

問題 No.915 Plus Or Multiple Operation
ユーザー ei1333333
提出日時 2019-10-25 22:41:27
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 2,961 bytes
コンパイル時間 2,003 ms
コンパイル使用メモリ 197,212 KB
最終ジャッジ日時 2025-01-08 01:31:07
ジャッジサーバーID
(参考情報)
judge3 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 10
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include<bits/stdc++.h>
using namespace std;
using int64 = long long;
const int mod = 998244353;
const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;
struct IoSetup {
IoSetup() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(10);
cerr << fixed << setprecision(10);
}
} iosetup;
template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 > &p) {
os << p.first << " " << p.second;
return os;
}
template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
is >> p.first >> p.second;
return is;
}
template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
for(int i = 0; i < (int) v.size(); i++) {
os << v[i] << (i + 1 != v.size() ? " " : "");
}
return os;
}
template< typename T >
istream &operator>>(istream &is, vector< T > &v) {
for(T &in : v) is >> in;
return is;
}
template< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }
template< typename T = int64 >
vector< T > make_v(size_t a) {
return vector< T >(a);
}
template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}
template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
t = v;
}
template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
for(auto &e : t) fill_v(e, v);
}
template< typename F >
struct FixPoint : F {
explicit FixPoint(F &&f) : F(forward< F >(f)) {}
template< typename... Args >
decltype(auto) operator()(Args &&... args) const {
return F::operator()(*this, forward< Args >(args)...);
}
};
template< typename F >
inline decltype(auto) MFP(F &&f) {
return FixPoint< F >{forward< F >(f)};
}
template< typename T >
vector< T > convert_base(T x, T b) {
vector< T > ret;
T t = 1, k = abs(b);
while(x) {
ret.emplace_back((x * t) % k);
if(ret.back() < 0) ret.back() += k;
x -= ret.back() * t;
x /= k;
t *= b / k;
}
if(ret.empty()) ret.emplace_back(0);
reverse(begin(ret), end(ret));
return ret;
}
int main() {
int Q;
cin >> Q;
while(Q--) {
int64 A, B, C;
cin >> A >> B >> C;
if(C == 1) {
cout << -1 << endl;
continue;
}
int64 ans = infll;
auto uku = convert_base(A, C);
for(int last = 0; last <= uku.size(); last++) {
int64 ret = 0;
ret += (uku.size() - last);
for(int i = last; i < uku.size(); i++) {
if(uku[i]) ++ret;
}
int64 cur = 0;
for(int i = 0; i < last; i++) {
cur = cur * C + uku[i];
}
chmin(ans, (cur + C - 2) / (C - 1) + ret);
}
cout << ans * B << endl;
}
}
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