Submission #848642

#	Time	Username	Problem	Language	Result	Execution time	Memory
848642		mariam197	Bank (IZhO14_bank)	C++17	0 / 100	1041 ms	19704 KiB

bank

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T>
#define ll long long
#define ld long double
#define mod 1000000007
#define all(x) x.begin(),x.end()
using ordered_set = tree<T, null_type,less<T>, rb_tree_tag,tree_order_statistics_node_update>;
vector<int> v[1005];
int n;
int a[20];
bool solve(int i,int mask){
    if(i==n){
        return 1;
    }
    bool res=1,b=0;
    for(auto j: v[a[i]]){
        int mx=max(mask,j);
        int y=(1<<(int)log(mx)+1)-1;
        if((mask^j)==y || mask==0){
            b=1;
            res&=solve(i+1,j);
        }
    }
    return (res&b);
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    freopen("bank.in","r",stdin);
    freopen("bank.out","w",stdout);
    int m;
    cin>>n>>m;
    vector<int> b(m);
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    for(int i=0;i<m;i++){
        cin>>b[i];
    }
    reverse(all(b));
    for(int mask=1;mask<(1<<m);mask++){
        ll sum=0;
        for(int i=0;i<m;i++){
            if((mask&(1<<i))){
                sum+=b[i];
            }
        }
        if(sum<=1000){
            v[sum].push_back(mask);
        }
    }
    cout<<(solve(0,0)==1?"YES":"NO");
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'bool solve(int, int)':
bank.cpp:22:31: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   22 |         int y=(1<<(int)log(mx)+1)-1;
      |                   ~~~~~~~~~~~~^~
bank.cpp: In function 'int main()':
bank.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     freopen("bank.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     freopen("bank.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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