結果
| 問題 | 
                            No.2066 Simple Math !
                             | 
                    
| コンテスト | |
| ユーザー | 
                             | 
                    
| 提出日時 | 2022-09-02 22:38:56 | 
| 言語 | C++14  (gcc 13.3.0 + boost 1.87.0)  | 
                    
| 結果 | 
                             
                                TLE
                                 
                             
                            
                         | 
                    
| 実行時間 | - | 
| コード長 | 3,530 bytes | 
| コンパイル時間 | 867 ms | 
| コンパイル使用メモリ | 102,324 KB | 
| 実行使用メモリ | 13,644 KB | 
| 最終ジャッジ日時 | 2024-11-16 04:51:14 | 
| 合計ジャッジ時間 | 46,493 ms | 
| 
                            ジャッジサーバーID (参考情報)  | 
                        judge2 / judge3 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 1 | 
| other | AC * 23 TLE * 8 | 
ソースコード
#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
// using Int = long long;
template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
constexpr unsigned __int128 toUInt128(const char *s) {
  unsigned __int128 x = 0;
  for (; *s; ++s) x = x * 10 + (*s - '0');
  return x;
}
constexpr __int128 toInt128(const char *s) {
  if (*s == '-') return -toInt128(s + 1);
  __int128 x = 0;
  for (; *s; ++s) x = x * 10 + (*s - '0');
  return x;
}
unsigned __int128 inUInt128() {
  static char buf[41];
  scanf("%s", buf);
  return toUInt128(buf);
}
__int128 inInt128() {
  static char buf[41];
  scanf("%s", buf);
  return toInt128(buf);
}
void out(unsigned __int128 x) {
  static char buf[41];
  int len = 0;
  do { buf[len++] = '0' + static_cast<int>(x % 10); } while (x /= 10);
  for (int i = len; --i >= 0; ) putchar(buf[i]);
}
void out(__int128 x) {
  if (x < 0) {
    putchar('-');
    out(-static_cast<unsigned __int128>(x));
  } else {
    out(static_cast<unsigned __int128>(x));
  }
}
std::ostream &operator<<(std::ostream &os, unsigned __int128 x) {
  static char buf[41];
  int len = 0;
  do { buf[len++] = '0' + static_cast<int>(x % 10); } while (x /= 10);
  for (int i = len; --i >= 0; ) os << buf[i];
  return os;
}
std::ostream &operator<<(std::ostream &os, __int128 x) {
  if (x < 0) {
    os << '-' << -static_cast<unsigned __int128>(x);
  } else {
    os << static_cast<unsigned __int128>(x);
  }
  return os;
}
using Int = __int128;
Int gcd(Int a, Int b) {
  return b ? gcd(b, a % b) : a;
}
inline Int floor(Int a, Int m) { return a / m - ((a % m < 0) ? 1 : 0); }
Int sumFloors(Int m, Int a, Int b, Int l, Int r) {
	if (l > r) return 0;
	const Int q = floor(a, m);
	const Int aa = a - q * m;
	const Int ll = floor(aa * l + b, m) + 1;
	const Int rr = floor(aa * r + b, m);
	return q * ((r + 1) * r / 2 - l * (l - 1) / 2) + r * rr - (l - 1) * (ll - 1) + (rr - ll + 1) + sumFloors(aa, -m, b, ll, rr);
}
int main() {
  for (int numCases; ~scanf("%d", &numCases); ) { for (int caseId = 1; caseId <= numCases; ++caseId) {
    Int P = inInt128();
    Int Q = inInt128();
    const Int K = inInt128();
    
    const Int G = gcd(P, Q);
    P /= G;
    Q /= G;
    
    Int lo = -1, hi = Q * K + 1;
    for (; lo + 1 < hi; ) {
      const Int mid = (lo + hi) / 2;
      const Int num = sumFloors(Q, -P, mid + Q, 0, min(mid / P, Q - 1));
      ((num >= K + 1) ? hi : lo) = mid;
    }
    Int ans = hi;
    ans *= G;
    out(ans);
    puts("");
  }
#ifndef LOCAL
  break;
#endif
  }
  return 0;
}