oj.uz

Submission #607699

# Submission time Handle Problem Language Result Execution time Memory
607699 2022-07-27T01:09:31 Z Soul234 Vještica (COCI16_vjestica) C++14
160 / 160
 389 ms 4960 KB 
#include<bits/stdc++.h>
using namespace std;

void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pb push_back
#define tcT template<class T
#define nl "\n"

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;
using str = string;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;

void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

tcT> bool ckmin(T&a, const T&b) {
    return b < a ? a=b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) {
    return b > a ? a=b,1 : 0; }

const int MOD = 1e9 + 7;

int N, freq[20][26];
str s;

int dp[1<<20];

int calc(int msk) {
    int &res = dp[msk];
    if(~res) return res;
    vi mn(26, MOD);
    F0R(i,N) if(msk>>i&1) {
        F0R(j,26) ckmin(mn[j], freq[i][j]);
    }
    int com = 0;
    F0R(j,26) com += mn[j];
    if(__builtin_popcount(msk) == 1) return res = com;
    res = MOD;
    for(int sub = (msk-1)&msk; sub>0; sub = (sub-1)&msk) {
        ckmin(res, calc(sub) + calc(msk^sub) - com);
    }
    return res;
}

void solve() {
    memset(dp, -1, sizeof dp);
    cin>>N;
    F0R(i,N) {
        cin>>s;
        F0R(j,sz(s)) freq[i][s[j]-'a']++;
    }
    cout << calc((1<<N)-1)+1 << nl;
}

int main() {
    setIO();

    int t=1;
    //cin>>t;
    while(t-->0) {
        solve();
    }

    return 0;
}

Compilation message

vjestica.cpp: In function 'void setIO(std::string)':
vjestica.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vjestica.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
160.0 / 160.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4308 KB Output is correct
2 Correct 4 ms 4428 KB Output is correct
3 Correct 3 ms 4428 KB Output is correct
4 Correct 331 ms 4436 KB Output is correct
5 Correct 299 ms 4504 KB Output is correct
6 Correct 332 ms 4692 KB Output is correct
7 Correct 325 ms 4900 KB Output is correct
8 Correct 389 ms 4960 KB Output is correct
9 Correct 343 ms 4912 KB Output is correct
10 Correct 319 ms 4932 KB Output is correct