19 lines
320 B
C++
19 lines
320 B
C++
#include<cstdio>
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int n,m,x,res,l,r,a[1005],b[1005];
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int main()
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{
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scanf("%d%d",&m,&n);
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for(int i=1;i<=n;i++)
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{
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scanf("%d",&x);
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if(a[x]==0)
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{
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res++;
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r++; b[r]=x; a[x]=1;
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if(r>m) l++,a[b[l]]=0;
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}
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}
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printf("%d\n",res);
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return 0;
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}
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