Submission #983963

#	Time	Username	Problem	Language	Result	Execution time	Memory
983963		Whisper	Bosses (BOI16_bosses)	C++17	100 / 100	1382 ms	1360 KiB

bosses

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define For(i, a, b) for (int i = (a); i <= (b); i++)
#define Ford(i, a, b) for (int i = (b); i >= (a); i --)
#define Rep(i, n) for (int i = 0; i < (n); ++i)
#define Repd(i, n) for (int i = (n) - 1; i >= 0; --i)

#define overload(_1, _2, _3, NAME, ...) NAME
#define FOR(...) overload(__VA_ARGS__, For, Rep)(__VA_ARGS__)
#define FORD(...) overload(__VA_ARGS__, Ford, Repd)(__VA_ARGS__)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)


constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void setupIO(){
    #define name "Whisper"
    //Phu Trong from Nguyen Tat Thanh High School for gifted student
    srand(time(NULL));
    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    cout << fixed << setprecision(10);
}

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }

const int MAX = 1e4 + 5;
struct Edge{
    int u, v, w;
    Edge(){}
    Edge(int _u, int _v): u(_u), v(_v){}
    Edge(int _u, int _v, int _w): u(_u), v(_v), w(_w){}

    int other(int x){return (x ^ u ^ v); }
} edge[MAX];

vector<int> G[MAX];
int numNode;


int bfs(int root){
    queue<pair<int, int>> q;
    vector<int> vis(numNode + 1);
    q.emplace(root, 1);
    vis[root] = 1;
    while (q.size()){
        int u = q.front().first;
        int st = q.front().second;
        q.pop();
        for (int &i : G[u]){
            int v = edge[i].other(u);
            if(vis[v]) continue;
            vis[v] = st + 1;
            q.emplace(v, st + 1);
        }
    }
    sort(vis.begin() + 1, vis.end(), greater<int>());


    int ans = 0;
    int salaries = 0;
    for (int i = 1; i <= numNode; ++i){
        if(!vis[i]) return LINF;
        ans += vis[i];
    }
    return ans;
}
void Whisper(){
    cin >> numNode;
    int cnt = 0;
    for (int i = 1; i <= numNode; ++i){
        int numEdge; cin >> numEdge;
        for (int v = 1; v <= numEdge; ++v){
            ++cnt;
            edge[cnt].u = i;
            cin >> edge[cnt].v;
            G[edge[cnt].v].emplace_back(cnt);
        }
    }

    int ans = LINF;
    for (int i = 1; i <= numNode; ++i){
        minimize(ans, bfs(i));
    }
    cout << ans;
}


signed main(){
    setupIO();
    int Test = 1;
//    cin >> Test;
    for ( int i = 1 ; i <= Test ; i++ ){
        Whisper();
        if (i < Test) cout << '\n';
    }
}

Compilation message (stderr)

bosses.cpp: In function 'long long int bfs(long long int)':
bosses.cpp:83:9: warning: unused variable 'salaries' [-Wunused-variable]
   83 |     int salaries = 0;
      |         ^~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33