Submission #210178

#	Time	Username	Problem	Language	Result	Execution time	Memory
210178		bash	Bosses (BOI16_bosses)	C++17	100 / 100	1326 ms	916 KiB

bosses

/**
    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
    */
#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>

#define F first
#define S second
#define endl '\n'
#define deb(x) cout<<#x<<' '<<x<<endl;
#define pb push_back


#ifdef IZI_KATKA
#define int __int64_t
#else
#define int __int64_t
#endif

const long long MOD = 1e18 + 7;
const long long MAXN = 5001 + 1;
using namespace std;

typedef long long ll;

long long readInt() {
  bool minus1 = false;
  long long result = 0;
  char ch;
  ch = getchar();
  while (true) {
    if (ch == '-') break;
    if (ch >= '0' && ch <= '9') break;
    ch = getchar();
  }
  if (ch == '-') minus1 = true; else result = ch-'0';
  while (true) {
    ch = getchar();
    if (ch < '0' || ch > '9') break;
    result = result*10 + (ch - '0');
  }
  if (minus1)
    return -result;
  else
    return result;
}

int ans[MAXN];
int used[MAXN];
vector <int> g[MAXN];
int par[MAXN];
int n;
vector<int> vec;


int bfs(int s) {
  memset(used, 0, sizeof(used));
  memset(ans, 0, sizeof(ans));
  queue<int> q;
  vec.clear();
  q.push (s);
  used[s] = true;
  par[s] = -1;
  while (!q.empty()) {
    int v = q.front();
    q.pop();
    vec.push_back(v);
    for (size_t i=0; i<g[v].size(); ++i) {
      int to = g[v][i];
      if (!used[to]) {
        used[to] = true;
        q.push (to);

        par[to] = v;
      }
    }
  }
  if(vec.size() != n) return MOD;
  int tot = 0;
  for (int i = vec.size() - 1; i >= 0; i--) {
    ans[vec[i]]++;
    tot += ans[vec[i]];
    if (par[vec[i]] != -1) {
      ans[par[vec[i]]] += ans[vec[i]];
    }
  }	
  return tot;
}

main() {
  #ifdef IZI_KATKA
  assert(freopen("input", "r", stdin));
  assert(freopen("output", "w", stdout));
  #endif
  n = readInt();
  for (int i = 1; i <= n; i++) {
    int m = readInt();
    for (int j = 1; j <= m; j++) {
      int x = readInt();
      g[x].pb(i);
    }
  }
  int res = MOD;
  for (int i = 1; i <= n; i++) {
    res = min(res, bfs(i));    	
  }
  cout << res;
  return 0;
}

Compilation message (stderr)

bosses.cpp: In function '__int64_t bfs(__int64_t)':
bosses.cpp:97:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(vec.size() != n) return MOD;
      ~~~~~~~~~~~^~~~
bosses.cpp: At global scope:
bosses.cpp:109:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

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