Submission #995659

#	Time	Username	Problem	Language	Result	Execution time	Memory
995659		kokoue	Bank (IZhO14_bank)	C++14	0 / 100	2 ms	348 KiB

bank

#include<bits/stdc++.h>
#define maxn 21
using namespace std;
int n,m;
int dp[1<<maxn],sum[1<<maxn],pref[maxn],a[maxn],b[maxn];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m;
    for(int i=0;i<n;i++)
    {
        cin>>a[i];
        if(i!=0) {pref[i]=pref[i-1]+a[i];continue;}
        pref[i]=a[i];
    }
    for(int i=0;i<m;i++)
    {
        cin>>b[i];
    }
    for(int i=1;i<(1<<m);i++)
    {
        for(int j=0;j<m;j++)
        {
            if(i&(1<<j)) sum[i]+=b[j];
        }
    }
    for(int i=0;i<(1<<m);i++)
    {
        for(int j=0;j<m;j++)
        {
            if(!(i&(1<<j))) continue;
            int k=dp[i^(1<<j)];
            int s;
            if(k==0) s==0;
            else s=pref[k-1];
            if(sum[i]-s==a[k]) dp[i]=max(dp[i],dp[i^(1<<j)]+1);
            else dp[i]=max(dp[i],dp[i^(1<<j)]);
        }
        if(dp[i]==n) {cout<<i<<"\nYES\n";return 0;}
    }
    cout<<"NO\n";
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:36:23: warning: statement has no effect [-Wunused-value]
   36 |             if(k==0) s==0;
      |                      ~^~~
bank.cpp:38:22: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
   38 |             if(sum[i]-s==a[k]) dp[i]=max(dp[i],dp[i^(1<<j)]+1);
      |                ~~~~~~^~

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