49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
#include <iostream>
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#include <iostream>
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#include <algorithm>
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#include <cstdio>
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using namespace std;
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int main(){
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int T,n;
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double a,b;
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double ap,gp;
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int sumap,sumgp,ans;
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scanf("%d",&T);
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while(T--){
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scanf("%d",&n);
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sumap = 2,sumgp = 2,ans = 2;
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scanf("%lf",&a);
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if(n==1) {
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printf("1\n");
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continue;
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}
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scanf("%lf",&b);
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ap = b-a;
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gp = b/a;
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a = b;
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double tmap,tmgp;
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for(int i=2;i<n;i++){
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scanf("%lf",&b);
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tmap = b-a;
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tmgp = b/a;
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if(ap == tmap) sumap++;
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else{
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ans = max(ans,sumap);
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sumap = 2;
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ap = tmap;
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}
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if(gp == tmgp) sumgp++;
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else{
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ans = max(ans,sumgp);
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sumgp = 2;
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gp = tmgp;
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}
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a = b;
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}
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ans = max(ans,sumap);
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ans = max(ans,sumgp);
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printf("%d\n",ans);
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}
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return 0;
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}
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