Submission #1033068

#	Time	Username	Problem	Language	Result	Execution time	Memory
1033068		vannnnnnnn	Martian DNA (BOI18_dna)	C++14	100 / 100	27 ms	5212 KiB

dna

#include<bits/stdc++.h>
using namespace std;
int note[200005], lst[200005], mp[200005], a[200005];
int main()
{
	int n, k, r, ans=1e9;
	scanf("%d %d %d", &n, &k, &r);
	for(int i=1; i<=n; i++)
	{
		scanf("%d", &a[i]);
	}
	for(int i=1; i<=r; i++)
	{
		int c, d;
		scanf("%d %d", &c, &d);
		note[c]=d;
		lst[i]=c;
	}
	int start=1, find=0;
	for(int i=1; i<=n; i++)
	{
		mp[a[i]]++;
		if(find==0)
		{
			find=1;
			for(int j=1; j<=r; j++)
			{
				if(mp[lst[j]]<note[lst[j]])
				{
					find=0;
					break;
				}
			}	
		}
		while(start<i)
		{
			if(mp[a[start]]-1>=note[a[start]])
			{
				mp[a[start]]--;
				start++;
			}
			else
			{
				break;
			}
		}
		if(find==1)
		{
			ans=min(ans, i-start+1);
		}
	}
	if(ans==1e9)printf("impossible\n");
	else printf("%d\n", ans);
}

Compilation message (stderr)

dna.cpp: In function 'int main()':
dna.cpp:7:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |  scanf("%d %d %d", &n, &k, &r);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
dna.cpp:10:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~
dna.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   scanf("%d %d", &c, &d);
      |   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 16 / 16
• Subtask 2: 24 / 24
• Subtask 3: 28 / 28
• Subtask 4: 32 / 32