Submission #1088520

#	Time	Username	Problem	Language	Result	Execution time	Memory
1088520		vjudge1	Izbori (COCI17_izbori)	C++17	0 / 80	76 ms	65536 KiB

izbori

#include <bits/stdc++.h>
#include <fstream>
using namespace std;

// #define int long long
#define endl '\n'
const int mxn = 501;
const int mod = 1e8;
// int dx[] = {0 , 0 , 1 , -1};
// int dy[] = {1 , -1 , 0 , 0};
//DFS
//----------------------------------
// vector<int> adj[mxn];
// int n , m;
// bool vis[mxn];
// int P[mxn];
// int rem[mxn];
// void dfs(int i){
//     vis[i] = 1;
//     for(auto j : adj[i]){
//         if(!vis[j]){
//             P[j] = i;
//             dfs(j);
//         }
//     }
//     return;
// }
//----------------------------------
//Seg-Tree
//----------------------------------
// int Tree[1 << (int)(ceil(log2(mxn))) + 1];
// int N = 1 << (int)(ceil(log2(mxn)));
// int l ,r;
// int Search(int i , int lr , int rr){
//     if(lr >= l and rr <= r){
//         return Tree[i];
//     }
//     if(lr > r or rr < l) return -1;
//     return max(Search(i * 2 , lr , (lr + rr) / 2) , Search(i * 2 + 1 , (lr + rr) / 2 + 1 , rr));
// }
// void update(int i){
//     while(i /= 2){
//         Tree[i] = max(Tree[i * 2] , Tree[i * 2 + 1]);
//     }
//     return;
// }
//----------------------------------
//comp
//----------------------------------
// map<int , int>mp;
// map<int , int>pm;
// void comp(set<int>s)
// {
//     int idx = 0;
//     for(auto i : s){
//         mp[i] = idx;
//         pm[idx] = i;
//         idx ++;
//     }
// }
//----------------------------------
int n , m , k;
vector<int>a;
set<int>glo;
vector<set<int>>subsets;
void rec(int i){
    if(i == a.size()) return;
    glo.insert(a[i]);
    subsets.push_back(glo);
    rec(i + 1);
    glo.erase(a[i]);
    rec(i + 1);
    return;
}
int solve(vector<vector<int>>vec){
    int mx = -1;
    int cnt[m + 5] = {};
    for(int i = 0 ; i < n;  i++){
        if(vec[i].empty()) continue;
        if(mx == -1) mx = vec[i][0];
        cnt[vec[i][0]] ++;
        if(cnt[vec[i][0]] > cnt[mx] || (cnt[vec[i][0]] == cnt[mx] and vec[i][0] < mx)) mx = vec[i][0];
    }
    if(m - vec[0].size() == 0){
        cout << mx << endl;
    }
    if(mx == k) return m - vec[0].size();
    else return 1e9;
}
signed main() {
  cin.tie(0) -> sync_with_stdio(0);
  cin >> n >> m >> k;
  set<int>mt;
  subsets.push_back(mt);
  vector<int>v[n];
  for(int i = 0 ; i < n ; i++){
      for(int j = 0 ; j < m ; j++){
          int x;
          cin >> x;
          if(x != k) a.push_back(x);
          v[i].push_back(x);
      }
  }
  rec(0);
  int mn = 1e9;
  for(int i = 0 ; i < subsets.size() ; i++){
      vector<vector<int>>sol;
      for(int k = 0 ; k < n ; k++){
          vector<int>p;
          for(int j = 0 ; j < m ; j++){
              if(subsets[i].find(v[k][j]) == subsets[i].end()){
                p.push_back(v[k][j]);
              }
          }
          sol.push_back(p);
      }
      mn = min(mn , solve(sol));
  }
  cout << mn << endl;
}

Compilation message (stderr)

izbori.cpp: In function 'void rec(int)':
izbori.cpp:67:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     if(i == a.size()) return;
      |        ~~^~~~~~~~~~~
izbori.cpp: In function 'int main()':
izbori.cpp:106:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::set<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |   for(int i = 0 ; i < subsets.size() ; i++){
      |                   ~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 80