結果
問題 | No.25 有限小数 |
ユーザー | shihu |
提出日時 | 2024-09-27 20:26:29 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 2 ms / 5,000 ms |
コード長 | 2,578 bytes |
コンパイル時間 | 5,007 ms |
コンパイル使用メモリ | 300,500 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-27 20:26:39 |
合計ジャッジ時間 | 5,861 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 1 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 1 ms
6,944 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 1 ms
6,944 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 1 ms
6,940 KB |
testcase_14 | AC | 1 ms
6,940 KB |
testcase_15 | AC | 2 ms
6,944 KB |
testcase_16 | AC | 1 ms
6,940 KB |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 2 ms
6,944 KB |
testcase_19 | AC | 2 ms
6,944 KB |
testcase_20 | AC | 2 ms
6,940 KB |
testcase_21 | AC | 1 ms
6,940 KB |
testcase_22 | AC | 2 ms
6,940 KB |
testcase_23 | AC | 2 ms
6,944 KB |
testcase_24 | AC | 1 ms
6,940 KB |
testcase_25 | AC | 2 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,940 KB |
testcase_27 | AC | 2 ms
6,940 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 2 ms
6,940 KB |
testcase_30 | AC | 1 ms
6,944 KB |
ソースコード
// #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> #include <atcoder/all> using namespace std; using namespace atcoder; using mint = modint998244353; // using mint = modint1000000007; using ll = long long; using ull = unsigned long long; using ld = long double; using pii = pair<int, int>; using pll = pair<ll, ll>; using T = tuple<int, int, int>; using G = vector<vector<int>>; #define rep(i, n) for (ll i = 0; i < (n); ++i) #define rep2(i, a, b) for (ll i = a; i < (b); ++i) #define rrep2(i, a, b) for (ll i = a-1; i >= (b); --i) #define rep3(i, a, b, c) for (ll i = a; i < (b); i+=c) #define rng(a) a.begin(),a.end() #define rrng(a) a.rbegin(),a.rend() #define popcount __builtin_popcount #define popcountll __builtin_popcountll #define fi first #define se second #define UNIQUE(v) sort(rng(v)), v.erase(unique(rng(v)), v.end()) #define MIN(v) *min_element(rng(v)) #define MAX(v) *max_element(rng(v)) #define SUM(v) accumulate(rng(v),0) #define IN(v, x) (find(rng(v),x) != v.end()) template<class T> bool chmin(T &a,T b){if(a>b){a=b;return 1;}else return 0;} template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;} template<class T> void printv(vector<T> &v){rep(i,v.size())cout<<v[i]<<" \n"[i==v.size()-1];} template<class T> void printvv(vector<vector<T>> &v){rep(i,v.size())rep(j,v[i].size())cout<<v[i][j]<<" \n"[j==v[i].size()-1];cout<<endl;} const ll dx[] = {0, 1, 0, -1}; const ll dy[] = {1, 0, -1, 0}; const ll dxx[] = {0, 1, 0, -1, 1, -1, 1, -1}; const ll dyy[] = {1, 0, -1, 0, 1, 1, -1, -1}; const ll LINF = 1001002003004005006ll; const int INF = 1001001001; ll gcd(ll a, ll b){ return (b ? gcd(b, a%b) : a); } ll lcm(ll a, ll b){ return a/gcd(a, b)*b; } // ax+by=gとなるg=gcd(a, b), x, yを求める拡張gcd tuple<ll, ll, ll> extgcd(ll a, ll b) { if (b == 0) return {a, 1, 0}; ll g, x, y; tie(g, x, y) = extgcd(b, a%b); return {g, y, x-a/b*y}; } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); ll n, m; cin >> n >> m; ll g = gcd(n, m); n /= g, m /= g; int cnt2 = 0, cnt5 = 0; while(m%2 == 0) m /= 2, cnt2++; while(m%5 == 0) m /= 5, cnt5++; if (m != 1){ cout << -1 << endl; return 0; } while(n%10 == 0) n /= 10; if (cnt2 < cnt5){ rep(i, cnt5 - cnt2){ n *= 2; n %= 10; } } else if(cnt2 > cnt5){ rep(i, cnt2 - cnt5){ n *= 5; n %= 10; } } cout << n%10 << endl; return 0; }