Submission #472274

#	Time	Username	Problem	Language	Result	Execution time	Memory
472274		elgamalsalman	Political Development (BOI17_politicaldevelopment)	C++14	16 / 100	67 ms	4516 KiB

politicaldevelopment

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second

typedef long long ll;
typedef pair<ll, ll> ii;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<ii> vii;
typedef vector<vii> vvii;

int n, k;
bool foundTriple = 0, foundDouble = 0;
vvi  adj;
bitset<5005> adjMatrix[5005];

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

  cin >> n >> k;
  adj.assign(n + 20, vi());
  for (int i = 0; i < n; i++) {
    int d; cin >> d;
    while (d--) {
      foundDouble = 1;
      int v; cin >> v;
      adj[i].push_back(v);
      adj[v].push_back(i);
      adjMatrix[i][v] = 1;
      adjMatrix[v][i] = 1;
    }
  }

  for (int i = 0; !foundTriple && i < n; i++) {
    for (int j = 0; !foundTriple && j < adj[i].size(); j++) {
      for (int k = j + 1; !foundTriple && k < adj[i].size(); k++) {
	int jj = adj[i][j];
	int kk = adj[i][k];
	if (adjMatrix[jj][kk]) {
	  foundTriple = 1;
	  //cerr << "// " << i << ", " << jj << ", " << kk << "\n";
	}
      }
    }
  }

  if (foundTriple) cout << "3\n";
  else if (foundDouble) cout << "2\n";
  else cout << "1\n";
}

Compilation message (stderr)

politicaldevelopment.cpp: In function 'int main()':
politicaldevelopment.cpp:39:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for (int j = 0; !foundTriple && j < adj[i].size(); j++) {
      |                                     ~~^~~~~~~~~~~~~~~
politicaldevelopment.cpp:40:45: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |       for (int k = j + 1; !foundTriple && k < adj[i].size(); k++) {
      |                                           ~~^~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 0 / 23
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23