Submission #1056575

#	Time	Username	Problem	Language	Result	Execution time	Memory
1056575		vjudge1	Bank (IZhO14_bank)	C++14	100 / 100	77 ms	19888 KiB

bank

#include<bits/stdc++.h>
#define int long long
#define emb emplace_back
#define ii pair<int,int>
#define fi first
#define se second
using namespace std;
const int N=21+5,mod=1e9+7;
int n,M[N],ans,m,a[N],b[N];
bool k[(1<<21)+5];
ii f[(1<<21)+5];
bool on(int mask,int i){
return (mask>>1)&1;
}
int ex(int mask,int i){

return mask^(1<<i);
}
main(){


      ios_base::sync_with_stdio(false);
      cin.tie(NULL);
      cout.tie(NULL);
      if(fopen("bank.in","r")){
      freopen("bank.in","r",stdin);
      freopen("bank.out","w",stdout);
      }
      cin >> n >> m;
   for(int i=1;i<=n;++i)cin >> a[i];
   for(int i=0;i<m;++i)cin >> b[i];
   f[0]={1,0};
   k[0]=1;
   for(int mask=1;mask<(1<<m);++mask){

    for(int i=0;i<m;++i){
        if(mask&(1<<i))
        if(k[mask^(1<<i)]){
            ii res=f[mask^(1<<i)];
            res.se+=b[i];
            if(res.se<a[res.fi]){
                k[mask]=true;
                f[mask]=res;
            }
            else{
                if(res.se==a[res.fi]){
                        k[mask]=true;
                    f[mask]={res.fi+1,0};
                }
            }
            //cout<<i<<'\n';
        }

    }
   }

   for(int i=1;i<(1<<m);++i){
    if(f[i].fi>n){
        cout<<"YES";
        return 0;
    }

   }
   cout <<"NO";
}

Compilation message (stderr)

bank.cpp:19:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   19 | main(){
      | ^~~~
bank.cpp: In function 'int main()':
bank.cpp:26:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |       freopen("bank.in","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:27:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |       freopen("bank.out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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