Submission #13508

#	Time	Username	Problem	Language	Result	Execution time	Memory
13508		woqja125	Bank (IZhO14_bank)	C++98	100 / 100	195 ms	4800 KiB

bank

#include<stdio.h>
#include<set>
const int MAX = 20;
const int PMAX = 1<<MAX;
int a[MAX], b[MAX];
int s[MAX];
int cnt[PMAX];
int max(int a, int b){return a>b?a:b;}
int main()
{
	int n, m;
	int i, j;
	scanf("%d%d", &n, &m);
	for(i=0; i<n; i++)
	{
		scanf("%d", a+i);
		s[i] += a[i];
		s[i+1] += s[i];
	}
	for(i=0; i<m; i++)scanf("%d", b+i);
	for(i=0; i<(1<<m); i++)
	{
		int x = i;
		int sum = 0;
		for(j=0; j<m; j++) if((x>>j)&1) sum += b[j];
		int type = -1;
		for(j=0; j<n; j++) if(s[j] == sum) type = j;
		if(type == 0) cnt[i] = 1;
		else if(type == -1)
		{
			for(j=0; j<m; j++) if((x>>j)&1) cnt[i] = max(cnt[i], cnt[i-(1<<j)]);
		}
		else
		{
			for(j=0; j<m; j++) if(((x>>j)&1) && cnt[i-(1<<j)] == type) cnt[i] = type+1;
		}
		if(cnt[i] == n)
		{
			printf("YES");
			return 0;
		}
	}
	printf("NO");
	return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~
bank.cpp:16:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", a+i);
   ~~~~~^~~~~~~~~~~
bank.cpp:20:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(i=0; i<m; i++)scanf("%d", b+i);
                    ~~~~~^~~~~~~~~~~

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