Submission #1281586

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281586		Faisal_Saqib	Bank (IZhO14_bank)	C++20	100 / 100	264 ms	11808 KiB

bank

/* 
    VENI VIDI VICI
*/

// #pragma GCC optimize("Ofast","unroll-all-loops","fast-math","no-stack-protector","give-no-fuck")
#include <bits/stdc++.h>
// #include <iostream>
// #include <vector>
// #include <algorithm>
// #include <set>
// #include <map>

using namespace std;
#define fi first
#define se second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()

#define rep(i,x, n) for (int i = (x); i < (n); ++i)
#define repr(i,x, n) for (int i = (n) - 1; i >= (x); --i)
mt19937 RNG(chrono::steady_clock::now().time_since_epoch().count());  
// #define sum accumulate

//using i128 = __int128;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using str = string;
using pi = pair<int, int>;
using pl = pair<ll, ll>;

using vi = vector<int>;
using vl = vector<ll>;
using vpi = vector<pair<int, int>>;
using vvi = vector<vi>;
using sll = set<ll>;

template<class T>
istream& operator>>(istream& is, vector<T>& v) {
    for(auto &i:v) is>>i;
    return is;
}
template<class T1,class T2>
istream& operator>>(istream& is, pair<T1,T2>& p) {
    is>>p.fi>>p.se;
    return is;
}
template<class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    for(const auto &i:v) os<<i<<' ';
    return os;
}
template<class T1,class T2>
ostream& operator<<(ostream& os, const pair<T1,T2>& p) {
    os<<p.fi<<' '<<p.se; return os;
}
void pyn(bool x)
{
    cout<<(x?"YES":"NO")<<endl;
}
void pYN(bool x)
{
    cout<<(x?"Yes":"No")<<endl;
}
void pAB(bool x)
{
    cout<<(x?"Alice":"Bob")<<endl;
}
ll powmod(ll a,ll b,ll modulo)
{
  if(b==0){
    return 1;
  }
  ll temp=powmod(a,b/2,modulo);
  if(b%2==0){
    return (temp*temp)%modulo;
  }
  else{
    return (a*((temp*temp)%modulo))%modulo;
  }
}
bool Prime(ll n){
    for (ll i = 2; i*i <= n; i++)
        if (n % i == 0)
            return false;
    return (n>1);
}
void readIO() {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
}

void solve();

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

    // readIO();

    int uwu=1;

    // cin>>uwu;

    for(int tc=1;tc<=uwu;tc++) {
        // cout<<"Case #"<<tc<<": ";
        solve();
    }
    return 0;
}
const int N=22,K=(1<<20)+100;
bitset<K> dp[N];
int a[N],b[N],sm[K];
vector<int> ind[K];
void solve()
{
    ll n,m;
    cin>>n>>m;
    for(int i=0;i<n;i++)cin>>a[i];
    for(int j=0;j<m;j++)cin>>b[j];
    int tot=(1<<m)-1;
    dp[0][0]=1;
    // for(int i=0;i<n;i++)
    // {
    //     cout<<ind[a[i]].size()<<' '<<a[i]<<' '<<i<<endl;
    // }
    // sleep(2);
    for(int mk=0;mk<(1<<m);mk++)
    {
        for(int i=0;i<m;i++)
        {
            if((mk>>i)&1)
            {
                sm[mk]+=b[i];
            }
        }
        if(sm[mk]<=1000)
        {
            // cout<<"At "<<mk<<' '<<sm[mk]<<endl;
            ind[sm[mk]].pb(mk);
        }
    }
    // cout<<ind[9].size()<<endl;
    // for (auto i:ind[9])
    //   cout<<i<<' ';
    // cout<<endl;
    // exit(0);
    for(int i=0;i<n;i++)
    {
        // cout<<"Index: ";
        // for(auto j:ind[a[i]])
        // {
        //     cout<<j<<' ';
        // }
        // cout<<endl;
        // we have to make the sum equal to 
        for(int k=dp[i]._Find_first();k<(1<<m);k=dp[i]._Find_next(k))
        {
            // for(int j=k;j>0;j=(j-1)&k)
            // {
            //     dp[i+1].set(k^j);
            // }
        // // cout<<"SZ "<<ind[a[i]].size()<<endl;
        // // cout<<ind[a[i]].size()<<' '<<a[i]<<' '<<i<<endl;
            for(auto j:ind[a[i]])
            {
                if((k&j)==0)
                {
                    dp[i+1].set(k|j);
                }
            }
        }
    }
    if(dp[n].any())
    {
        cout<<"YES"<<endl;
    }
    else
    {
        cout<<"NO"<<endl;
    }
}

Compilation message (stderr)

bank.cpp: In function 'void readIO()':
bank.cpp:90:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:91:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29