Submission #725871

#	Time	Username	Problem	Language	Result	Execution time	Memory
725871		AndrijaM	Bank (IZhO14_bank)	C++14	71 / 100	1076 ms	189108 KiB

bank

#include <bits/stdc++.h>

using namespace std;

int n,m;
int x[23];
int y[23];
int dp[23][(1<<21)];

bool f(int idx,int mask)
{
    if(idx==n)
    {
        return 1;
    }
    if(__builtin_popcount(mask)==m)
    {
        return 0;
    }
    if(dp[idx][mask]!=-1)return dp[idx][mask];
    int rez=0;
    for(int i=0;i<(1<<m);i++)
    {
        int sum=0;
        for(int bit=0;bit<=23;bit++)
        {
            if(i&mask)
            {
                break;
            }
            else
            {
                if(i&(1<<bit))
                {
                    sum+=y[bit];
                }
            }
        }
        if(sum==x[idx])
        {
            int bmask=mask;
            bmask|=i;
            rez|=f(idx+1,bmask);
        }
    }
    return dp[idx][mask]=rez;
}

int main()
{
    memset(dp,-1,sizeof dp);
    cin>>n>>m;
    for(int i=0;i<n;i++)cin>>x[i];
    for(int i=0;i<m;i++)cin>>y[i];
    int k=0;

    if(f(0,0))
    {
        cout<<"YES"<<endl;
        return 0;
    }
    cout<<"NO"<<endl;
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'bool f(int, int)':
bank.cpp:46:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   46 |     return dp[idx][mask]=rez;
      |            ~~~~~~~~~~~~~^~~~
bank.cpp: In function 'int main()':
bank.cpp:55:9: warning: unused variable 'k' [-Wunused-variable]
   55 |     int k=0;
      |         ^

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