Submission #673320

#	Time	Username	Problem	Language	Result	Execution time	Memory
673320		beedle	Bank (IZhO14_bank)	C++17	0 / 100	106 ms	262144 KiB

bank

#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <set>
#include <iterator>
#include <stack>
#include <map>
#include <math.h>
#include <bitset>
#include <deque>
#include <string>
#include <tuple>
#include <queue>
#include <numeric>
#include <complex>
#include <assert.h>
#include <unordered_set>
#include <unordered_map>
#define ll long long
#define ld long long double
#define rep(i, a, b) for (long long i = a; i <= b; i++)
#define mod 1000000007ll
#define INF 1e18
#define pb push_back
#define ff first
#define ss second
#define endl '\n'
#define all(x) (x).begin (), (x).end ()
#define sz(x) (ll) (x).size ()
#define reunique(v) v.resize(std::unique(v.begin(), v.end()) - v.begin())
#define rank rnk
#define log lg
#define fast                                                                  \
    ios_base::sync_with_stdio (false);                                        \
    cin.tie (NULL);                                                           \
    cout.tie (NULL)
 
using namespace std;

signed main()
{
    fast;

    freopen("bank.in","r",stdin);
    freopen("bank.out","w",stdout);

    ll n,m;
    cin>>n>>m;
    ll s1=0, s2=0;
    ll p[n], notes[m];
    rep(i,0,n-1)
    cin>>p[i], s1+=p[i];
    rep(i,0,m-1)
    cin>>notes[i], s2+=notes[i];

    if(s1>s2)
    {
        cout<<"NO"<<endl;
        exit(0);
    }

    vector <ll> validmasks[n];
    rep(i,0,n-1)
    rep(mask,0,(1<<m)-1)
    {
        ll s=0;
        rep(idx,0,m-1)
        if(mask&(1ll<<idx))
        s+=notes[idx];

        if(s==p[i])
        validmasks[i].pb(mask);
    }

    bool cancover[n][(1<<m)];
    rep(i,0,n-1)
    rep(mask,0,(1<<m)-1)
    cancover[i][mask]=false;

    for(auto mask:validmasks[0])
    cancover[0][mask]=true;

    rep(i,1,n-1)
    rep(mask,0,(1<<m)-1)
    {
        for(auto submask:validmasks[i])
        if((submask&(~mask))==0)
        cancover[i][mask]|=cancover[i-1][mask^submask];    
    }

    bool ans=false;
    rep(mask,0,(1<<m)-1)
    ans|=cancover[n-1][mask];

    cout<<(ans?"YES":"NO");

    return 0;  
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:45:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     freopen("bank.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:46:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     freopen("bank.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 19
• Subtask 2: 0 / 25
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29