結果

問題 No.2072 Anatomy
ユーザー deuteridayodeuteridayo
提出日時 2022-09-17 06:42:05
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 133 ms / 2,000 ms
コード長 2,591 bytes
コンパイル時間 4,069 ms
コンパイル使用メモリ 237,896 KB
実行使用メモリ 11,136 KB
最終ジャッジ日時 2024-12-22 00:21:53
合計ジャッジ時間 7,790 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
このコードへのチャレンジ
(要ログイン)

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 2 ms
5,248 KB
testcase_02 AC 2 ms
5,248 KB
testcase_03 AC 2 ms
5,248 KB
testcase_04 AC 2 ms
5,248 KB
testcase_05 AC 2 ms
5,248 KB
testcase_06 AC 2 ms
5,248 KB
testcase_07 AC 2 ms
5,248 KB
testcase_08 AC 116 ms
9,904 KB
testcase_09 AC 131 ms
10,624 KB
testcase_10 AC 121 ms
8,320 KB
testcase_11 AC 123 ms
10,084 KB
testcase_12 AC 97 ms
7,936 KB
testcase_13 AC 129 ms
10,880 KB
testcase_14 AC 83 ms
7,424 KB
testcase_15 AC 80 ms
8,064 KB
testcase_16 AC 132 ms
10,752 KB
testcase_17 AC 127 ms
10,684 KB
testcase_18 AC 65 ms
7,296 KB
testcase_19 AC 132 ms
11,008 KB
testcase_20 AC 133 ms
11,136 KB
testcase_21 AC 132 ms
10,980 KB
testcase_22 AC 132 ms
11,128 KB
testcase_23 AC 130 ms
11,008 KB
testcase_24 AC 129 ms
11,008 KB
testcase_25 AC 133 ms
11,136 KB
testcase_26 AC 2 ms
5,248 KB
testcase_27 AC 130 ms
11,008 KB
testcase_28 AC 130 ms
11,100 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using lint = long long;
using ulint = unsigned long long;
#define endl '\n'
int const INF = 1<<30;
lint const INF64 = 1LL<<61;
// lint const Mod = 1e9+7;
long const mod = 998244353;
lint ceilDiv(lint x, lint y){if(x >= 0){return (x+y-1)/y;}else{return x/y;}}
lint floorDiv(lint x, lint y){if(x >= 0){return x/y;}else{return (x-y+1)/y;}}
lint Sqrt(lint x){lint upper = 1e9;lint lower = 0;while(upper - lower > 0){lint mid = (1+upper + lower)/2;if(mid * mid > x){upper = mid-1;}else{lower = mid;}}return upper;}
lint gcd(lint a,lint b){if(a<b)swap(a,b);if(a%b==0)return b;else return gcd(b,a%b);}
lint lcm(lint a,lint b){return (a / gcd(a,b)) * b;}
lint chmin(vector<lint>&v){lint ans = INF64;for(lint i:v){ans = min(ans, i);}return ans;}
lint chmax(vector<lint>&v){lint ans = -INF64;for(lint i:v){ans = max(ans, i);}return ans;}
double dist(double x1, double y1, double x2, double y2){return sqrt(pow(x1-x2, 2) + pow(y1-y2,2));}
string toString(lint n){string ans = "";if(n == 0){ans += "0";}else{while(n > 0){int a = n%10;char b = '0' + a;string c = "";c += b;n /= 10;ans = c + ans;}}return ans;}
string toString(lint n, lint k){string ans = toString(n);string tmp = "";while(ans.length() + tmp.length() < k){tmp += "0";}return tmp + ans;}
vector<lint>prime;void makePrime(lint n){prime.push_back(2);for(lint i=3;i<=n;i+=2){bool chk = true;for(lint j=0;j<prime.size() && prime[j]*prime[j] <= i;j++){if(i % prime[j]==0){chk=false;break;}}if(chk)prime.push_back(i);}}
lint Kai[20000001]; bool firstCallnCr = true; 
lint ncrmodp(lint n,lint r,lint p){ if(firstCallnCr){ Kai[0] = 1; for(int i=1;i<=20000000;i++){ Kai[i] = Kai[i-1] * i; Kai[i] %= mod;} firstCallnCr = false;} if(n<0)return 0;
if(n < r)return 0;if(n==0)return 1;lint ans = Kai[n];lint tmp = (Kai[r] * Kai[n-r]) % p;for(lint i=1;i<=p-2;i*=2){if(i & p-2){ans *= tmp;ans %= p;}tmp *= tmp;tmp %= p;}return ans;}


struct edge{
    int to;
};
using graph = vector<vector<edge>>;

int main(){
    lint n,m;
    cin >> n >> m;
    graph g(n);
    int u[m], v[m];
    for(int i = 0; i < m; i++) {
        cin >> u[i] >> v[i];
        u[i]--;
        v[i]--;
    }
    dsu d(n);
    vector<int>f(n);
    for(int i = m-1; i >=0;i--) {
        if(d.same(u[i], v[i])) {
            f[d.leader(u[i])] += 1;
        } else {
            int ul = d.leader(u[i]);
            int vl = d.leader(v[i]);
            d.merge(u[i], v[i]);
            f[d.leader(u[i])] = max(f[ul], f[vl]) + 1;
        }
    }
    cout << f[d.leader(0)] << endl;
    
    
}

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