結果
問題 | No.1813 Magical Stones |
ユーザー | heno239 |
提出日時 | 2022-01-14 22:14:56 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,790 bytes |
コンパイル時間 | 2,956 ms |
コンパイル使用メモリ | 170,064 KB |
実行使用メモリ | 30,428 KB |
最終ジャッジ日時 | 2024-11-20 11:15:11 |
合計ジャッジ時間 | 6,211 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | WA | - |
testcase_01 | AC | 8 ms
11,588 KB |
testcase_02 | WA | - |
testcase_03 | AC | 28 ms
24,856 KB |
testcase_04 | AC | 9 ms
11,588 KB |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | AC | 28 ms
25,112 KB |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | WA | - |
testcase_41 | WA | - |
testcase_42 | WA | - |
testcase_43 | WA | - |
ソースコード
#pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include<iostream> #include<string> #include<cstdio> #include<vector> #include<cmath> #include<algorithm> #include<functional> #include<iomanip> #include<queue> #include<ciso646> #include<random> #include<map> #include<set> #include<bitset> #include<stack> #include<unordered_map> #include<unordered_set> #include<utility> #include<cassert> #include<complex> #include<numeric> #include<array> #include<chrono> using namespace std; //#define int long long typedef long long ll; typedef unsigned long long ul; typedef unsigned int ui; constexpr ll mod = 1000000007; const ll INF = mod * mod; typedef pair<int, int>P; #define rep(i,n) for(int i=0;i<n;i++) #define per(i,n) for(int i=n-1;i>=0;i--) #define Rep(i,sta,n) for(int i=sta;i<n;i++) #define rep1(i,n) for(int i=1;i<=n;i++) #define per1(i,n) for(int i=n;i>=1;i--) #define Rep1(i,sta,n) for(int i=sta;i<=n;i++) #define all(v) (v).begin(),(v).end() typedef pair<ll, ll> LP; template<typename T> void chmin(T& a, T b) { a = min(a, b); } template<typename T> void chmax(T& a, T b) { a = max(a, b); } template<typename T> void cinarray(vector<T>& v) { rep(i, v.size())cin >> v[i]; } template<typename T> void coutarray(vector<T>& v) { rep(i, v.size()) { if (i > 0)cout << " "; cout << v[i]; } cout << "\n"; } ll mod_pow(ll x, ll n, ll m = mod) { if (n < 0) { ll res = mod_pow(x, -n, m); return mod_pow(res, m - 2, m); } if (abs(x) >= m)x %= m; if (x < 0)x += m; if (x == 0)return 0; ll res = 1; while (n) { if (n & 1)res = res * x % m; x = x * x % m; n >>= 1; } return res; } struct modint { int n; modint() :n(0) { ; } modint(ll m) { if (m < 0 || mod <= m) { m %= mod; if (m < 0)m += mod; } n = m; } operator int() { return n; } }; bool operator==(modint a, modint b) { return a.n == b.n; } modint operator+=(modint& a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; } modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; } modint operator*=(modint& a, modint b) { a.n = ((ll)a.n * b.n) % mod; return a; } modint operator+(modint a, modint b) { return a += b; } modint operator-(modint a, modint b) { return a -= b; } modint operator*(modint a, modint b) { return a *= b; } modint operator^(modint a, ll n) { if (n == 0)return modint(1); modint res = (a * a) ^ (n / 2); if (n % 2)res = res * a; return res; } ll inv(ll a, ll p) { return (a == 1 ? 1 : (1 - p * inv(p % a, a)) / a + p); } modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); } modint operator/=(modint& a, modint b) { a = a / b; return a; } const int max_n = 1 << 20; modint fact[max_n], factinv[max_n]; void init_f() { fact[0] = modint(1); for (int i = 0; i < max_n - 1; i++) { fact[i + 1] = fact[i] * modint(i + 1); } factinv[max_n - 1] = modint(1) / fact[max_n - 1]; for (int i = max_n - 2; i >= 0; i--) { factinv[i] = factinv[i + 1] * modint(i + 1); } } modint comb(int a, int b) { if (a < 0 || b < 0 || a < b)return 0; return fact[a] * factinv[b] * factinv[a - b]; } modint combP(int a, int b) { if (a < 0 || b < 0 || a < b)return 0; return fact[a] * factinv[a - b]; } ll gcd(ll a, ll b) { a = abs(a); b = abs(b); if (a < b)swap(a, b); while (b) { ll r = a % b; a = b; b = r; } return a; } typedef long double ld; typedef pair<ld, ld> LDP; const ld eps = 1e-8; const ld pi = acosl(-1.0); int dx[4] = { 1,0,-1,0 }; int dy[4] = { 0,1,0,-1 }; //----------------------------------------- ///////////////////////////////// struct graph { private: int n; vector<vector<int>> G, rG; vector<bool> used; vector<int> vs; int mk; vector<vector<int>> fG; vector<vector<int>> ori; vector<int> trans; public: graph(int sz) { n = sz; G.resize(n); rG.resize(n); used.resize(n); fG.resize(n); trans.resize(n, -1); ori.resize(n); } void add_edge(int a, int b) { G[a].push_back(b); rG[b].push_back(a); } void dfs(int v) { used[v] = true; rep(i, G[v].size()) { if (!used[G[v][i]])dfs(G[v][i]); } vs.push_back(v); } void rdfs(int v, int k) { used[v] = true; queue<int> q; q.push(v); vector<int> c; while (!q.empty()) { int id = q.front(); q.pop(); ori[k].push_back(id); rep(j, rG[id].size()) { int to = rG[id][j]; if (used[to]) { if (trans[to] >= 0)c.push_back(trans[to]); continue; } used[to] = true; q.push(to); } } sort(c.begin(), c.end()); int len = unique(c.begin(), c.end()) - c.begin(); rep(i, len) { fG[c[i]].push_back(k); } rep(i, ori[k].size()) { trans[ori[k][i]] = k; } } void scc() { fill(used.begin(), used.end(), false); rep(i, n) { if (!used[i])dfs(i); } fill(used.begin(), used.end(), false); int k = 0; per(i, (int)vs.size()) { if (!used[vs[i]]) { rdfs(vs[i], k); k++; } } mk = k; } int query() { int ans = 0; vector<bool> used(mk); vector<int> cnt(mk); rep(i, mk)for (int to : fG[i])cnt[to] = 1; rep(i, mk) { if (used[i])continue; ans++; if (fG[i].empty())continue; vector<int> ids; queue<int> q; used[i] = true; q.push(i); int x = 0, y = 0; while (!q.empty()) { int id = q.front(); q.pop(); if (cnt[id] == 0)x++; if (fG[id].empty())y++; for (int to : fG[id]) { if (!used[to]) { used[to] = true; q.push(to); } } } ans += max(x, y); } return ans; } }; void solve() { int n, m; cin >> n >> m; graph g(n); rep(i, m) { int a, b; cin >> a >> b; a--; b--; g.add_edge(a, b); } g.scc(); int ans = g.query(); cout << ans << "\n"; } signed main() { ios::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(10); //init_f(); //init(); //while(true) //useexpr(); //int t; cin >> t; rep(i, t) solve(); return 0; }