Submission #1128296

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128296		ntdaccode	Vještica (COCI16_vjestica)	C++20	160 / 160	62 ms	1352 KiB

vjestica

#include<bits/stdc++.h>
#define fori(i,a,b) for(int i=a;i<=b;i++)
#define pb push_back

using namespace std;

typedef pair<int,int> ii;
typedef tuple<int,int,int> tp;

const int M = 1e6 + 10;
const int N = 1e3 + 10;
const int mod = 1e9 + 7;

int n, cnt[20][30];
string s[20];
int f[1 << 16], g[1 << 16];

int tmp[30];

int32_t main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);

  if(fopen("1.inp","r")) {
    freopen("1.inp","r",stdin);
    freopen("1.out","w",stdout);
  }

  #define task ""
  if(fopen(task".inp","r")) {
    freopen(task".inp","r",stdin);
    freopen(task".out","w",stdout);
  }
  cin >> n;
  for(int i = 1;i <= n; i++) cin >> s[i];
  for(int i = 1;i <= n; i++) {
    int m = s[i].size();
    for(int j = 0;j < s[i].size(); j++) cnt[i][s[i][j] - 'a']++;

  }

  for(int mask = 1;mask < (1 << n); mask++) {
    for(int i = 0;i <= 25; i++) tmp[i] = 1e9;
    for(int i = 1;i <= n; i++) {
      if((mask >> i - 1) & 1) {
          for(int digit = 0;digit <= 25; digit++) {
              tmp[digit] = min(tmp[digit], cnt[i][digit]);
          }
      }
    }
    int k = __builtin_popcount(mask);
    for(int digit = 0;digit <= 25; digit++) {
      g[mask] += tmp[digit];
    }
    //cout << mask << " " << g[mask] << " " << k <<  "\n";
  }

  memset(f, 61, sizeof(f));
  for(int i = 1;i <= n; i++) {
    f[1 << i - 1] = s[i].size();
  }

  for(int mask = 1;mask < (1 << n); mask++) {
      if(__builtin_popcount(mask) == 1) continue;
      for(int submask = mask; submask; submask = (submask - 1) & mask) {
          f[mask] = min(f[mask], f[submask] + f[submask ^ mask] - g[mask]);
      }
      //cout << mask << " " << f[mask] << "\n";
  }
  cout << f[(1<<n) - 1] + 1;


}

Compilation message (stderr)

vjestica.cpp: In function 'int32_t main()':
vjestica.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen("1.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
vjestica.cpp:28:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |     freopen("1.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
vjestica.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
vjestica.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 160 / 160