結果
| 問題 |
No.186 中華風 (Easy)
|
| コンテスト | |
| ユーザー |
jjjjjjjtgpptmjj
|
| 提出日時 | 2021-02-28 22:19:46 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,617 bytes |
| コンパイル時間 | 2,053 ms |
| コンパイル使用メモリ | 197,512 KB |
| 最終ジャッジ日時 | 2025-01-19 08:45:52 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 21 WA * 2 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i,N) for(int i=0;i<int(N);++i)
#define rep1(i,N) for(int i=1;i<int(N);++i)
#define all(a) (a).begin(),(a).end()
#define bit(k) (1LL<<(k))
#define SUM(v) accumulate(all(v), 0LL)
typedef pair<int, int> i_i;
typedef pair<ll, ll> l_l;
template <class T> using vec = vector<T>;
template <class T> using vvec = vector<vec<T>>;
struct fast_ios{ fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; }fast_ios_;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
#define TOSTRING(x) string(#x)
template <typename T> istream &operator>>(istream &is, vector<T> &vec) { for (T &x : vec) is >> x; return is; }
template <typename T> ostream &operator<<(ostream &os, const vector<T> &v) { os << "["; for(auto _: v) os << _ << ", "; os << "]"; return os; };
template <typename T> ostream &operator<<(ostream &os, set<T> &st) { os << "("; for(auto _: st) { os << _ << ", "; } os << ")";return os;}
template <typename T> ostream &operator<<(ostream &os, multiset<T> &st) { os << "("; for(auto _: st) { os << _ << ", "; } os << ")";return os;}
template <typename T, typename U> ostream &operator<<(ostream &os, const pair< T, U >& p){os << "{" <<p.first << ", " << p.second << "}";return os; }
template <typename T, typename U> ostream &operator<<(ostream &os, const map<T, U> &mp){ os << "["; for(auto _: mp){ os << _ << ", "; } os << "]" << endl; return os; }
#define DUMPOUT cerr
void dump_func(){ DUMPOUT << endl; }
template <class Head, class... Tail> void dump_func(Head &&head, Tail &&... tail) { DUMPOUT << head; if (sizeof...(Tail) > 0) { DUMPOUT << ", "; } dump_func(std::move(tail)...); }
#ifdef DEBUG
#define dbg(...) { dump_func(__VA_ARGS__) }
#define dump(...) DUMPOUT << string(#__VA_ARGS__) << ": "; dump_func(__VA_ARGS__)
#else
#define dbg(...)
#define dump(...)
#endif
const int INF = (ll)1e9;
const ll INFLL = (ll)1e18+1;
const ll MOD = 1000000007;
// const ll MOD = 998244353;
const long double PI = acos(-1.0);
/*
const int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
const int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};
const string dir = "DRUL";
*/
long long extGCD(long long a, long long b, long long &x, long long &y) {
if (b == 0) {
x = 1;
y = 0;
return a;
}
long long x2, y2;
long long d = extGCD(b, a%b, x2, y2);
x = y2;
y = x2 - (a / b) * y2;
return d;
}
long long mod_inv(long long a, long long m){
long long x, y;
long long d = extGCD(a, m, x, y);
if(d != 1){
return -1;
}
x %= m;
if(x < 0)x += m;
return x;
}
std::pair<long long, long long> crt(const std::vector<long long> &r,
const std::vector<long long> &m){
assert(r.size() == m.size());
long long R = 0, M = 1; // Rに
int n = r.size();
for(int i = 0; i < n; i++){
long long p, q;
long long d = extGCD(M, m[i], p, q); // pはM/dのm[i]/dを法としたときの逆元
if((r[i] - R) % d != 0){
return {0, -1};
}
long long s = (r[i]-R)/d;
long long tmp = s * p % (m[i]/d);
R += M * tmp;
M *= m[i]/d;
}
return make_pair((R%M+M)%M, M);
}
int main() {
vector<ll> X(3), Y(3);
rep(i,3){
cin >> X[i] >> Y[i];
}
auto [ans, lcm] = crt(X, Y);
if(lcm == -1){
cout << -1 << endl;
}
else{
cout << ans << endl;
}
}
jjjjjjjtgpptmjj