Submission #526039

#	Time	Username	Problem	Language	Result	Execution time	Memory
526039		Snowfall	Martian DNA (BOI18_dna)	C++14	100 / 100	36 ms	4440 KiB

dna

#include<bits/stdc++.h>
using namespace std;
int uck;
int arr[200005];
int cn[200005],cur[200005];
main()
{
	int t,q,a;
    scanf("%d%d%d",&t,&a,&q);
    uck=q;
    for(int i = 1;i <= t;i++)
    {
        scanf("%d",&arr[i]);
    }
    for(int i = 1;i <= q;i++)
    {
        int m,n;
        scanf("%d%d",&m,&n);
        cn[m]=n;
    }
    int st=1,mn=1e9;
    for(int i = 1;i <= t;i++)
    {
        cur[arr[i]]++;
        if(cur[arr[i]]==cn[arr[i]])
        {
            uck--;
        }
        while(uck==0)
        {
            mn=min(mn,i-st+1);
            if(cur[arr[st]]==cn[arr[st]])
            {
                uck++;
            }
            cur[arr[st]]--;
            st++;
        }
    }
    if(mn==1e9)
    printf("impossible");
    else
    printf("%d",mn);
}

Compilation message (stderr)

dna.cpp:6:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    6 | main()
      | ^~~~
dna.cpp: In function 'int main()':
dna.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d%d%d",&t,&a,&q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
dna.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         scanf("%d",&arr[i]);
      |         ~~~~~^~~~~~~~~~~~~~
dna.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         scanf("%d%d",&m,&n);
      |         ~~~~~^~~~~~~~~~~~~~

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