結果

問題 No.1194 Replace
ユーザー suta28407928suta28407928
提出日時 2020-08-22 18:43:53
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
RE  
実行時間 -
コード長 3,932 bytes
コンパイル時間 1,034 ms
コンパイル使用メモリ 108,440 KB
実行使用メモリ 818,280 KB
最終ジャッジ日時 2024-10-15 12:08:53
合計ジャッジ時間 5,596 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
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ファイルパターン 結果
sample
other MLE * 1 RE * 6
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ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <string>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <unordered_map>
#include <map>
#include <set>
#include <algorithm>
#include <queue>
#include <stack>
#include <functional>
#include <bitset>
#include <assert.h>
#include <unordered_map>
#include <fstream>
#include <ctime>
#include <complex>
using namespace std;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<char> vc;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef pair<ll,ll> P;
typedef pair<int,int> pii;
typedef vector<P> vpl;
typedef tuple<ll,ll,ll> tapu;
#define rep(i,n) for(int i=0; i<(n); i++)
#define REP(i,a,b) for(int i=(a); i<(b); i++)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int inf = 1<<30;
const ll linf = 1LL<<62;
const int MAX = 1020000;
ll dy[8] = {1,-1,0,0,1,-1,1,-1};
ll dx[8] = {0,0,1,-1,1,-1,-1,1};
const double pi = acos(-1);
const double eps = 1e-7;
template<typename T1,typename T2> inline bool chmin(T1 &a,T2 b){
if(a>b){
a = b; return true;
}
else return false;
}
template<typename T1,typename T2> inline bool chmax(T1 &a,T2 b){
if(a<b){
a = b; return true;
}
else return false;
}
template<typename T> inline void print(T &a){
rep(i,a.size()) cout << a[i] << " ";
cout << "\n";
}
template<typename T1,typename T2> inline void print2(T1 a, T2 b){cout << a << " " << b << "\n";}
template<typename T1,typename T2,typename T3> inline void print3(T1 a, T2 b, T3 c){
cout << a << " " << b << " " << c << "\n";
}
ll pcount(ll x) {return __builtin_popcountll(x);}
//const int mod = 1e9 + 7;
const int mod = 998244353;
template <std::uint_fast64_t Modulus> class modint {
using u64 = std::uint_fast64_t;
public:
u64 a;
constexpr modint(const u64 x = 0) noexcept : a(x % Modulus) {}
constexpr u64 &value() noexcept { return a; }
constexpr const u64 &value() const noexcept { return a; }
constexpr modint operator+(const modint rhs) const noexcept {
return modint(*this) += rhs;
}
constexpr modint operator-(const modint rhs) const noexcept {
return modint(*this) -= rhs;
}
constexpr modint operator*(const modint rhs) const noexcept {
return modint(*this) *= rhs;
}
constexpr modint operator/(const modint rhs) const noexcept {
return modint(*this) /= rhs;
}
constexpr modint &operator+=(const modint rhs) noexcept {
a += rhs.a;
if (a >= Modulus) {
a -= Modulus;
}
return *this;
}
constexpr modint &operator-=(const modint rhs) noexcept {
if (a < rhs.a) {
a += Modulus;
}
a -= rhs.a;
return *this;
}
constexpr modint &operator*=(const modint rhs) noexcept {
a = a * rhs.a % Modulus;
return *this;
}
constexpr modint &operator/=(modint rhs) noexcept {
u64 exp = Modulus - 2;
while (exp) {
if (exp % 2) {
*this *= rhs;
}
rhs *= rhs;
exp /= 2;
}
return *this;
}
};
using mint = modint<mod>;
ll modpow(ll x, ll n, ll mod){
ll res = 1;
while(n > 0){
if(n & 1) res = res * x % mod;
x = x * x % mod;
n >>= 1;
}
return res;
}
vector<ll> fac(MAX), finv(MAX), inv(MAX);
void comInit(){
fac[0] = fac[1] = 1;
finv[0] = finv[1] = 1;
inv[1] = 1;
for(ll i=2; i<MAX; i++){
fac[i] = fac[i-1]*i % mod;
inv[i] = mod - inv[mod%i] * (mod/i) % mod;
finv[i] = finv[i-1] * inv[i] % mod;
}
}
ll com(ll n, ll k){
if(n < k) return 0;
if(n < 0 || k < 0) return 0;
return fac[n] * (finv[k] * finv[n-k] % mod) % mod;
}
int main(){
int n,m; cin >> n >> m;
vvl G(n);
rep(i,m){
int b,c; cin >> b >> c; b--; c--;
G[b].push_back(c);
}
vl mx(n); rep(i,n) mx[i] = i+1;
vb visit(n,false);
function<int(int)> dfs = [&](int u) -> int {
visit[u] = true;
for(auto v : G[u]){
if(visit[v]) chmax(mx[u], mx[v]);
else{
chmax(mx[u], dfs(v));
}
}
return mx[u];
};
rep(i,n){
if(visit[i]) continue;
dfs(i);
}
ll ans = 0;
rep(i,n) ans += mx[i];
cout << ans << "\n";
}
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