oj.uz

답안 #733656

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
733656 2023-05-01T07:16:55 Z Huseyn123 Cijanobakterije (COCI21_cijanobakterije) C++17
70 / 70
 264 ms 22164 KB 
#include <bits/stdc++.h>
#define MAX 200001
#define INF LLONG_MAX
#define MOD 1000000007
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ins insert
#define ff first
#define ss second
#define gett(x,m) get<m>(x)
#define all(a) a.begin(),a.end()
#define lb(a,b) lower_bound(all(a),b)
#define ub(a,b) upper_bound(all(a),b)
#define sortv(a) sort(all(a))
#define sorta(a,sz) sort(a,a+sz)
#define inputar(a,b){\
    for(int i=0;i<b;i++){\
        cin >> a[i];\
    }\
}
#define inputvec(a,b){\
    for(int i=0;i<b;i++){\
        ll num;\
        cin >> num;\
        a.pb(num);\
    }\
}
#define outputar(a,b){\
    for(int i=0;i<b;i++){\
        cout << a[i] << " ";\
    }\
    cout << "\n";\
}
#define outputvec(a){\
    for(auto x:a){\
        cout << x << " ";\
    }\
    cout << "\n";\
}
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef tuple<ll,ll,ll> tll;
typedef pair<ll,ll> pll;
typedef double db;
typedef long double ldb;
inline void USACO(string filename){
  freopen((filename+".in").c_str(),"r",stdin);
  freopen((filename+".out").c_str(),"w",stdout);
}
ll n,q,t=1,m,n2,m2,k,cnt=0,x,y,z,x2,y2,z2,res1=0,a[MAX],b[MAX];
ll c[1501][1501];
ll fact[MAX];
ll inv_fact[MAX];
string str[MAX];
string s1,s2;
const int mod = 998244353;
ll dx[4]={1,0,0,-1};
ll dy[4]={0,1,-1,0};
struct custom_hash {
   static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};
vector<ll> used;
vector<vector<ll>> g;
void dfs(ll v){
    used[v]=1;
    for(auto x:g[v]){
        if(used[x]){
            continue;
        }
        dfs(x);
    }
}
map<ll,ll> dist;
ll ans(ll rt){
    queue<ll> q;
    dist.clear();
    q.push(rt);
    dist[rt]=1;
    ll h,h1;
    h=rt;
    h1=1;
    while(!q.empty()){
        ll v=q.front();
        q.pop();
        for(auto x:g[v]){
            if(dist[x]!=0){
                continue;
            }
            q.push(x);
            dist[x]=dist[v]+1;
            if(dist[x]>h1){
                h1=dist[x];
                h=x;
            }
        }
    }
    dist.clear();
    q.push(h);
    dist[h]=1;
    h1=1;
    while(!q.empty()){
        ll v=q.front();
        q.pop();
        for(auto x:g[v]){
            if(dist[x]!=0){
                continue;
            }
            q.push(x);
            dist[x]=dist[v]+1;
            if(dist[x]>h1){
                h1=dist[x];
                h=x;
            }
        }
    }
    return h1;
}
void solve(){
    cin >> n >> m;
    g.resize(n+1);
    used.resize(n+1,0);
    for(int i=0;i<m;i++){
        cin >> x >> y;
        g[x].pb(y);
        g[y].pb(x);
    }
    vector<ll> c;
    for(int i=1;i<=n;i++){
        if(!used[i]){
            dfs(i);
            c.pb(i);
        }
    }
    ll res=0;
    for(auto x:c){
        res+=ans(x);
    }
    cout << res << "\n";
}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //USACO("poetry");
    //freopen("input.txt","r",stdin);
    //cin >> t;
    ll cnt1=1;
    while(t--){
        solve();
        cnt1++;
    }
}
/*
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
ifstream fin("template.in");
ofstream fout("template.out");
*/
/*
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
ifstream fin("template.in");
ofstream fout("template.out");
*/
/*
ll b[51][51];
b[0][0] = 1;
    for (int n = 1; n <= 50; ++n){
        b[n][0] = b[n][n] = 1;
        for (int k = 1; k < n; ++k)
            b[n][k] = b[n - 1][k - 1] + b[n - 1][k];
    }
*/

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 8788 KB Output is correct
2 Correct 60 ms 10956 KB Output is correct
3 Correct 99 ms 13216 KB Output is correct
4 Correct 146 ms 15400 KB Output is correct
5 Correct 182 ms 17548 KB Output is correct
6 Correct 235 ms 19812 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 165 ms 22164 KB Output is correct
2 Correct 8 ms 7764 KB Output is correct
3 Correct 12 ms 8752 KB Output is correct
4 Correct 17 ms 9672 KB Output is correct

Subtask #3
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 6484 KB Output is correct
2 Correct 4 ms 6484 KB Output is correct
3 Correct 3 ms 6484 KB Output is correct
4 Correct 3 ms 6484 KB Output is correct
5 Correct 15 ms 8660 KB Output is correct
6 Correct 25 ms 10728 KB Output is correct
7 Correct 34 ms 12936 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6612 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 4 ms 6612 KB Output is correct
4 Correct 3 ms 6612 KB Output is correct
5 Correct 4 ms 6612 KB Output is correct
6 Correct 4 ms 6612 KB Output is correct
7 Correct 4 ms 6612 KB Output is correct
8 Correct 4 ms 6612 KB Output is correct
9 Correct 4 ms 6612 KB Output is correct
10 Correct 5 ms 6612 KB Output is correct
11 Correct 3 ms 6612 KB Output is correct

Subtask #5
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 29 ms 8788 KB Output is correct
2 Correct 60 ms 10956 KB Output is correct
3 Correct 99 ms 13216 KB Output is correct
4 Correct 146 ms 15400 KB Output is correct
5 Correct 182 ms 17548 KB Output is correct
6 Correct 235 ms 19812 KB Output is correct
7 Correct 165 ms 22164 KB Output is correct
8 Correct 8 ms 7764 KB Output is correct
9 Correct 12 ms 8752 KB Output is correct
10 Correct 17 ms 9672 KB Output is correct
11 Correct 3 ms 6484 KB Output is correct
12 Correct 4 ms 6484 KB Output is correct
13 Correct 3 ms 6484 KB Output is correct
14 Correct 3 ms 6484 KB Output is correct
15 Correct 15 ms 8660 KB Output is correct
16 Correct 25 ms 10728 KB Output is correct
17 Correct 34 ms 12936 KB Output is correct
18 Correct 4 ms 6612 KB Output is correct
19 Correct 3 ms 6612 KB Output is correct
20 Correct 4 ms 6612 KB Output is correct
21 Correct 3 ms 6612 KB Output is correct
22 Correct 4 ms 6612 KB Output is correct
23 Correct 4 ms 6612 KB Output is correct
24 Correct 4 ms 6612 KB Output is correct
25 Correct 4 ms 6612 KB Output is correct
26 Correct 4 ms 6612 KB Output is correct
27 Correct 5 ms 6612 KB Output is correct
28 Correct 3 ms 6612 KB Output is correct
29 Correct 264 ms 19836 KB Output is correct
30 Correct 23 ms 11724 KB Output is correct
31 Correct 43 ms 14144 KB Output is correct
32 Correct 34 ms 12740 KB Output is correct
33 Correct 66 ms 14480 KB Output is correct
34 Correct 47 ms 12988 KB Output is correct
35 Correct 47 ms 14156 KB Output is correct
36 Correct 118 ms 16348 KB Output is correct
37 Correct 72 ms 14456 KB Output is correct
38 Correct 201 ms 18724 KB Output is correct
39 Correct 51 ms 14316 KB Output is correct