oj.uz

답안 #561032

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
561032 2022-05-12T07:52:19 Z fatemetmhr Friends (BOI17_friends) C++17
69 / 100
 70 ms 5448 KB 
//  ~Be name khoda~  //

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

#define pb       push_back
#define mp       make_pair
#define all(x)   x.begin(), x.end()
#define fi       first
#define se       second

const int maxn  =  1e6   + 10;
const int maxn5 =  25e2  + 10;
const int maxnt =  1.2e6 + 10;
const int maxn3 =  1e3   + 10;
const int mod   =  1e9   +  7;
const ll  inf   =  1e18;

int grsz, mxed, pos = 0;
vector <int> verex, adj[maxn5], av[maxn5], tmp, esh;
int grsize, outedge, haveout[maxn5];
bool re, ntm[maxn5], ex[maxn5];
bool ex1[maxn5], ex2[maxn5];
bool ed[maxn5][maxn5], ab[maxn5];

inline void kill(){
    cout << "detention" << endl;
    exit(0);
}

inline void solve(){
    if(grsize > grsz || outedge > mxed)
        return;
    if(re)
        return;
    int v = -1;
    for(auto u : verex) for(auto z : adj[u]) if(ntm[z]){
        v = z;
    }
    if(v == -1){
        //cout << "and now " << pos << ' ' << verex.size() << endl;
        av[pos] = verex;
        re = true;
        return;
    }

    //cout << verex.size() << ' ' << "this is " << v << endl;
    ntm[v] = false;
    ex[v] = true;
    verex.pb(v);
    grsize++;
    int remem = outedge;
    for(auto u : adj[v]) if(!ntm[u] && !ex[u])
        outedge++;
    solve();
    //cout << "finaly see " << v << ' ' << verex.size() << endl;
    if(re)
        return;
    verex.pop_back();
    ex[v] = false;
    grsize--;
    outedge = remem;
    for(auto u : adj[v]) if(!ntm[u] && ex[u])
        outedge++;
    solve();
    if(re)
        return;
    outedge = remem;
    ntm[v] = true;
    return;
}

inline void mostaghel_kon(int id1, int id2){
    if(av[id1].empty() || av[id2].empty())
        return;
    esh.clear();
    for(auto u : av[id1])
        ex1[u] = true;
    for(auto u : av[id2])
        ex2[u] = true;
    for(auto u : av[id2]) if(ex1[u]){
        esh.pb(u);
        ab[u] = true;
    }
    int ext1 = 0, ext2 = 0;
    for(auto u : esh) for(auto z : adj[u]) if(!ab[z]){
        if(ex1[z])
            ext1++;
        if(ex2[z])
            ext2++;
    }
    tmp.clear();
    int rpid = id1;
    if(ext1 + haveout[id1] <= mxed){
        for(auto u : av[id1]) if(!ab[u])
            tmp.pb(u);
    }
    else{
        rpid = id2;
        for(auto u : av[id2]) if(!ab[u])
            tmp.pb(u);
    }
    for(auto u : av[id1])
        ex1[u] = false;
    for(auto u : av[id2])
        ex2[u] = false;
    for(auto u : esh)
        ab[u] = false;
    av[rpid] = tmp;
    return;
}

int main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);

    int n; cin >> n >> grsz >> mxed;

    for(int i = 0; i < n; i++){
        int l; cin >> l;
        while(l--){
            int a; cin >> a;
            ed[i][a] = true;
            adj[i].pb(a);
        }
    }
    for(int i = 0; i < n; i++) if(adj[i].size() > grsz + mxed)
        kill();
    for(int i = 0; i < n; i++) for(int j = i + 1; j < n; j++)
        if(ed[i][j] != ed[j][i])
            kill();

    for(int i = 0; i < n; i++){
        memset(ntm, true, sizeof ntm);
        ex[i] = true;
        ntm[i] = re = false;
        outedge = 0;
        grsize = 1;
        verex.clear();
        verex.pb(i);
        solve();
        if(!re)
            kill();
        haveout[pos] = outedge;
        pos++;
    }
    /*
    cout << "___" << endl;
    for(int i = 0; i < n; i++){
        cout << av[i].size() << ' ';
        for(auto u : av[i])
            cout << u << ' ';
        cout << endl;
    }
    //*/
    cout << "home" << endl;
    memset(ex, false, sizeof ex);
    for(int i = 0; i < n; i++) for(int j = i + 1; j < n; j++)
        mostaghel_kon(i, j);
    int cnt = 0;
    for(int i = 0; i < n; i++) if(av[i].size())
        cnt++;
    cout << cnt << endl;
    for(int i = 0; i < n; i++) if(av[i].size()){
        cout << av[i].size() << ' ';
        for(auto u : av[i])
            cout << u << ' ';
        cout << '\n';
    }
}

Compilation message

friends.cpp: In function 'int main()':
friends.cpp:130:49: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  130 |     for(int i = 0; i < n; i++) if(adj[i].size() > grsz + mxed)
      |                                   ~~~~~~~~~~~~~~^~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 440 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 448 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 448 KB Output is correct
8 Correct 1 ms 444 KB Output is correct

Subtask #2
37.0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 2 ms 1108 KB Output is correct

Subtask #3
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 980 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 2 ms 1108 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 13 ms 3028 KB Output is correct
11 Correct 21 ms 3672 KB Output is correct
12 Correct 22 ms 3528 KB Output is correct
13 Correct 26 ms 3668 KB Output is correct
14 Correct 5 ms 4948 KB Output is correct
15 Correct 5 ms 4948 KB Output is correct
16 Correct 3 ms 5448 KB Output is correct

Subtask #4
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 440 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 448 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 448 KB Output is correct
8 Correct 1 ms 444 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 2 ms 852 KB Output is correct
11 Correct 1 ms 724 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 980 KB Output is correct
14 Correct 1 ms 980 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 2 ms 1108 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 13 ms 3028 KB Output is correct
19 Correct 21 ms 3672 KB Output is correct
20 Correct 22 ms 3528 KB Output is correct
21 Correct 26 ms 3668 KB Output is correct
22 Correct 5 ms 4948 KB Output is correct
23 Correct 5 ms 4948 KB Output is correct
24 Correct 3 ms 5448 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Incorrect 70 ms 5252 KB Output isn't correct
27 Halted 0 ms 0 KB -