Submission #90521

#	Time	Username	Problem	Language	Result	Execution time	Memory
90521		daniel_02	Bank (IZhO14_bank)	C++14	71 / 100	1059 ms	2692 KiB

bank

#include <bits/stdc++.h>

#define fr first
#define pb push_back
#define sc second
#define ll long long

using namespace std;

const int N = 23;

int a[N], b[N];
bool dp[N][(1 << 20) + 7];
vector<int>v;

main()
{
	int n, m, x;
	
	cin >> n >> m;
	
	for (int i = 1; i <= n; i++)
	{
		scanf("%d", &a[i]);
	}
	for (int i = 1; i <= m; i++)
	{
		scanf("%d", &b[i]);
	}
	for (int msk = 1; msk < (1 << m); msk++)
	{
		int sm = 0;
		for (int i = 0; i < m; i++)
		{
			if (msk & (1 << i))
			{
				sm += b[i + 1];
			}
		}
		if (sm == a[1])
		{
			//cout << 1 << " " << msk << endl;
			dp[1][msk] = 1;
		}
	}
	for (int i = 2; i <= n; i++)
	{
		for (int msk = 1; msk < (1 << m); msk++)
		{
			if (!dp[i - 1][msk])continue;
			for (int j = 0; j < m; j++)
			{	
				if (!(msk & (1 << j)))
				{
					v.pb(j + 1);
				}
			}
			int sz = v.size();
			for (int msk1 = 1; msk1 < (1 << sz); msk1++)
			{
				int sm = 0;
				for (int j = 0; j < sz; j++)
				{
					if (msk1 & (1 << j))
					{
						sm += b[v[j]];
					}
				}
				if (sm == a[i])
				{
					int tmp = msk;
					for (int j = 0; j < sz; j++)
					{
						if (msk1 & (1 << j))
						{
							tmp = (tmp | (1 << (v[j] - 1)));
							//cout << j << " " << v[j] << endl;
						}
					}
					//cout << i << " " << msk << " " << tmp << endl;
					dp[i][tmp] = 1;
				}
			}
			v.clear();
		}
	}
	
	for (int msk = 1; msk < (1 << m); msk++)
	{
		if (dp[n][msk])
		{
			puts("YES");
			return 0;
		}
	}
	puts("NO");
}

Compilation message (stderr)

bank.cpp:16:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
bank.cpp: In function 'int main()':
bank.cpp:18:12: warning: unused variable 'x' [-Wunused-variable]
  int n, m, x;
            ^
bank.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~
bank.cpp:28:8: 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