Submission #861310

#	Time	Username	Problem	Language	Result	Execution time	Memory
861310		nnhzzz	Bosses (BOI16_bosses)	C++14	100 / 100	451 ms	852 KiB

bosses

#include<bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i = (a); i<=(b); ++i)
#define REPD(i,a,b) for(int i = (a); i>=(b); --i)
#define REPDIS(i,a,b,c) for(int i = (a); i<=(b); i += c)
#define task "test"
#define task1 "nnhzzz"
#define ALL(x) (x).begin(),(x).end()
#define SZ(x) (int)(x).size()
#define MASK(x) (1LL<<x)
#define BIT(x,i) ((x>>i)&1LL)
#define vi vector<int>
#define vvi vector<vi>
#define pii pair<int,int>
#define vpii vector<pii>
#define fi first
#define se second
#define ld long double
#define ll long long

//-------------------------------------------------------------------------------//
template<typename T> bool mini(T &a, T b){if(a>b){a=b;return true;}return false;}
template<typename T> bool maxi(T &a, T b){if(a<b){a=b;return true;}return false;}
//-------------------------------------------------------------------------------//
const int MAXN = 5e3+7,N = 1e5+7,inf = 1e9,LOG = 20;
const int MOD = 1e9+7,MOD1 = 123456789;
//-------------------------------------------------------------------------------//

vi adj[MAXN];

void solve(){
    int res = inf,n; cin >> n;
    REP(i,1,n){
        int k; cin >> k;
        while(k--){
            int j; cin >> j;
            adj[j].push_back(i);
        }
    }
    REP(s,1,n){
        queue<int> q; q.push(s);
        vi dep(n+3,0); dep[s] = 1;
        int ma = 1;
        while(SZ(q)!=0){
            int u = q.front(); q.pop();
            REP(i,0,SZ(adj[u])-1){
                int v = adj[u][i];
                if(dep[v]!=0) continue;
                dep[v] = dep[u]+1;
                maxi(ma,dep[v]);
                q.push(v);
            }
        }
        int sum = 0;
        REP(i,1,n){
            if(dep[i]==0) sum = inf;
            sum += dep[i];
        }
        mini(res,sum);
    }
    cout << res;
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    if(fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    if(fopen(task1".inp","r")){
        freopen(task1".inp","r",stdin);
        freopen(task1".out","w",stdout);
    }
    solve();
    return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
bosses.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bosses.cpp:74:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   74 |         freopen(task1".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bosses.cpp:75:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |         freopen(task1".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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