Submission #1183395

#	Time	Username	Problem	Language	Result	Execution time	Memory
1183395		hmms127	Bank (IZhO14_bank)	C++20	71 / 100	1092 ms	436 KiB

bank

#include <bits/stdc++.h>
using namespace std;
#define f1(n) for(int i=0;i<n;i++)
#define speed ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define int long long
#define pb push_back
int getbit(int n,int idx){return ((n>>idx)&1LL);}
typedef long long ll;
const int N=20+5;
int n,m,a[N],b[N];bool vis[N];
int rec(int idx){
  if(idx==n)return 1;
  for(int mask=0;mask<(1<<m);++mask){
    vector<int> v;bool valid=true;int sm=0;
    for(int i=0;i<m;i++){
      if(getbit(mask,i)){
        if(vis[i]){
          valid=false;
          break;
        }
        else v.pb(i),sm+=b[i];
      }
    }
    if(valid&&sm==a[idx]){
      for(auto it:v)vis[it]=true;
      if(rec(idx+1))return 1;
      for(auto it:v)vis[it]=false;
    }
  }
  return 0;
}
int32_t main()
{
     speed;
     int tt=1,cnt=1;//cin>>tt;
     while(tt--){
       //freopen("bank.in","r",stdin);
       //freopen("bank.out","w",stdout);
       cin>>n>>m;
       f1(n)cin>>a[i];f1(m)cin>>b[i];
       cout<<(rec(0) ? "YES":"NO");
     }
}

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