Submission #91101

#	Time	Username	Problem	Language	Result	Execution time	Memory
91101		Aydarov03	Bank (IZhO14_bank)	C++14	71 / 100	84 ms	7932 KiB

bank

#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <algorithm>
using namespace std;

int a[25] , b[25];
vector <int> v[20005];
bool us[25];
int n , m;


void rec( int id = 1 , int OR = 0)
{
    for(auto c : v[ a[id] ] )
    {
        if( (c & OR) == 0 )
        {
            if( id == n )
            {
                puts("YES");
                exit(0);
            }

            rec( id+1 , OR | c );
        }
    }
}



main()
{
    scanf("%d%d" , &n , &m);

    for(int i = 1; i <= n; i++)
        scanf("%d" , &a[i]);
    for(int i = 1; i <= m; i++)
        scanf("%d" , &b[i]);


    if( n == m )
    {
        for(int i = 1; i <= n; i++)
        {
            bool ok = false;
            for(int j = 1; j <= m; j++)
            {
                if( !us[j] && a[i] == b[i] )
                {
                    us[j] = 1;
                    ok = 1;
                    break;
                }
            }
            if( !ok )
            {
                    puts("NO");
                    return 0;
            }

        }

        puts("YES");
        return 0;

    }



    for(int mask = 1; mask < (1<<m); mask++)
    {
        int sum = 0;
        for(int i = 0; i < m; i++)
        {
            if( mask & ( (1<<i) ) )
                sum += b[i+1];
        }
        v[sum].push_back( mask );
    }

    for(int i = 1; i <= n; i++)
    {
        if( v[a[i]].size() == 0 )
        {
            puts("NO");
            return 0;
        }
    }

    rec();


    puts("NO");
}

Compilation message (stderr)

bank.cpp:32:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
bank.cpp: In function 'int main()':
bank.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d" , &n , &m);
     ~~~~~^~~~~~~~~~~~~~~~~~
bank.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d" , &a[i]);
         ~~~~~^~~~~~~~~~~~~~
bank.cpp:39:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d" , &b[i]);
         ~~~~~^~~~~~~~~~~~~~

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