# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
167684 | atoiz | Vještica (COCI16_vjestica) | C++14 | 97 ms | 1272 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/*input
3 a ab c
*/
#include <iostream>
#include <vector>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <string>
#include <cassert>
#include <algorithm>
#include <cstdlib>
#include <numeric>
#include <utility>
#include <tuple>
#include <climits>
#include <fstream>
#include <bitset>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <stack>
#include <queue>
#include <random>
#include <chrono>
#include <ios>
#include <iomanip>
#include <functional>
using namespace std;
#define FOR(i, a, b) for (int i = a; i <= b; ++i)
#define FORA(i, a) for (auto &i : a)
#define FORB(i, a, b) for (int i = a; i >= b; --i)
#define SZ(a) ((int) a.size())
#define ALL(a) begin(a), end(a)
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
#define fi first
#define se second
// start of code
signed main()
{
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int N;
cin >> N;
vector<vector<int>> cnt(N, vector<int>(26, 0));
FOR(i, 0, N - 1) {
string str;
cin >> str;
FORA(ch, str) {
++cnt[i][(int) ch - 'a'];
}
}
static const int INF = 1e9;
vector<int> dp(1 << N, INF);
FOR(mask, 1, (1 << N) - 1) {
if (__builtin_popcount(mask) == 1) {
int i = __lg(mask);
dp[mask] = accumulate(cnt[i].begin(), cnt[i].end(), 0);
continue;
}
for (int submask = mask & (mask - 1); submask; submask = mask & (submask - 1)) {
dp[mask] = min(dp[mask], dp[mask ^ submask] + dp[submask]);
}
vector<int> tmp(26, INF);
FOR(i, 0, N - 1) if ((mask >> i) & 1) FOR(j, 0, 25) {
tmp[j] = min(tmp[j], cnt[i][j]);
}
dp[mask] -= accumulate(tmp.begin(), tmp.end(), 0);
}
cout << dp[(1 << N) - 1] + 1 << endl;
return 0;
}
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