結果
問題 | No.2461 一点張り |
ユーザー | ktr216 |
提出日時 | 2023-09-08 21:26:48 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 6 ms / 2,000 ms |
コード長 | 4,171 bytes |
コンパイル時間 | 1,755 ms |
コンパイル使用メモリ | 169,960 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-26 14:16:46 |
合計ジャッジ時間 | 2,317 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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
5,248 KB |
testcase_01 | AC | 5 ms
5,376 KB |
testcase_02 | AC | 5 ms
5,376 KB |
testcase_03 | AC | 5 ms
5,376 KB |
testcase_04 | AC | 5 ms
5,376 KB |
testcase_05 | AC | 6 ms
5,376 KB |
testcase_06 | AC | 5 ms
5,376 KB |
testcase_07 | AC | 4 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h>using namespace std;#define double long doubleusing ll = long long;using ull = unsigned long long;using VB = vector<bool>;using VVB = vector<VB>;using VVVB = vector<VVB>;using VC = vector<char>;using VVC = vector<VC>;using VI = vector<int>;using VVI = vector<VI>;using VVVI = vector<VVI>;using VVVVI = vector<VVVI>;using VL = vector<ll>;using VVL = vector<VL>;using VVVL = vector<VVL>;using VVVVL = vector<VVVL>;using VVVVVL = vector<VVVVL>;using VD = vector<double>;using VVD = vector<VD>;using VVVD = vector<VVD>;//using P = pair<int, int>;#define REP(i, n) for (ll i = 0; i < (int)(n); i++)#define FOR(i, a, b) for (ll i = a; i < (ll)(b); i++)#define ALL(a) (a).begin(),(a).end()constexpr int INF = 1001001001;constexpr ll LINF = 1001001001001001001ll;constexpr int DX[] = {1, 0, -1, 0};constexpr int DY[] = {0, 1, 0, -1};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); }const ll MOD = 998244353;//const ll MOD = 1000000007;const int MAX_N = 400010;int par[MAX_N];int rnk[MAX_N];int siz[MAX_N];void init(int n) {REP(i,n) {par[i] = i;rnk[i] = 0;siz[i] = 1;}}int find(int x) {if (par[x] == x) {return x;} else {return par[x] = find(par[x]);}}void unite(int x, int y) {x = find(x);y = find(y);if (x == y) return;int s = siz[x] + siz[y];if (rnk[x] < rnk[y]) {par[x] = y;} else {par[y] = x;if (rnk[x] == rnk[y]) rnk[x]++;}siz[find(x)] = s;}bool same(int x, int y) {return find(x) == find(y);}int size(int x) {return siz[find(x)];}ll mod_pow(ll x, ll n, ll mod) {ll res = 1;x %= mod;while (n > 0) {if (n & 1) res = res * x % mod;x = x * x % mod;n >>= 1;}return res;}ll gcd(ll x, ll y) {if (y == 0) return x;return gcd(y, x % y);}/*typedef pair<ll, int> P0;struct edge { int to; ll cost; };const int MAX_V = 200000;//const ll LINF = 1LL<<60;int V;vector<edge> G[MAX_V];ll d[MAX_V];void dijkstra(ll s) {priority_queue<P0, vector<P0>, greater<P0> > que;fill(d, d + V, LINF);d[s] = 0;que.push(P0(0, s));while (!que.empty()) {P0 p = que.top(); que.pop();int v = p.second;if (d[v] < p.first) continue;for (edge e : G[v]) {if (d[e.to] > d[v] + e.cost) {d[e.to] = d[v] + e.cost;que.push(P0(d[e.to], e.to));}}}}*//*double EPS = 1e-10;double add(double a, double b) {if (abs(a + b) < EPS * (abs(a) + abs(b))) return 0;return a + b;}struct P {double x, y;P() {}P(double x, double y) : x(x), y(y) {}P operator + (P p) {return P(add(x, p.x), add(y, p.y));}P operator - (P p) {return P(add(x, -p.x), add(y, -p.y));}P operator * (double d) {return P(x * d, y * d);}double dot(P p) {return add(x * p.x, y * p.y);}double det(P p) {return add(x * p.y, -y * p.x);}};bool on_seg(P p1, P p2, P q) {return ()}P intersection(P p1, P p2, P q1, P q2) {return p1 + (p2 - p1) * ((q2 - q1).det(q1 - p1) / (q2 - q1).det(p2 - p1));}*//*VL F(400010, 1);ll C(ll n, ll k) {return F[n] * mod_pow(F[k], MOD - 2, MOD) % MOD * mod_pow(F[n - k], MOD - 2, MOD) % MOD;}*/bool fcomp(const VL& a, const VL& b) {if (a[0] * (b[0] + b[1]) > b[0] * (a[0] + a[1])) return true;if (a[0] * (b[0] + b[1]) < b[0] * (a[0] + a[1])) return false;return a[2] < b[2];}int main() {ios::sync_with_stdio(false);std::cin.tie(nullptr);int t;cin >> t;while (t--) {double p, ans = 0, x = 1;int K;cin >> p >> K;REP(i, K - 1) {ans += x * p * (i + 1);x *= (1.0 - p);}ans += x * K;cout << fixed << setprecision(15) << ans << endl;}}