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# Author Problem Lang Verdict Time Memory Sent Judged  
224792948 Practice:
bkifhr6 		616D - 18 C++20 (GCC 11-64) Accepted 748 ms 8184 KB 2023-09-23 21:24:00 2023-09-23 21:24:00
→ Source 
#include<iostream>
int a[1<<20][2],l,r,i,j,d,n,k;
int main(){
    std::cin>>n>>k;
    for(i=j=1;j<=n;r-l<=j-i?l=i,r=j:0,++j)
        for(std::cin>>a[j][0],d+=++a[a[j][0]][1]==1;d>k;d-=--a[a[i++][0]][1]==0);
    std::cout<<l<<" "<<r;
}
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Time: ? ms, memory: ? KB
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