35 lines
544 B
C++
35 lines
544 B
C++
#include<bits/stdc++.h>
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using namespace std;
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using ll = long long;
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void solve()
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{
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int n;
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cin>>n;
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int a[n];
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for(int i=0; i<n; ++i)
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{
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cin>>a[i];
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}
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for(int i=1; i<n-1; ++i)
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{
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if(a[i]!=a[i-1] && a[i]!=a[i+1])
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{
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cout<<i+1<<endl;
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return;
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}
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}
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if(a[0]!=a[n/2]) cout<<"1"<<endl;
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else cout<<n<<endl;
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}
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int main()
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{
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ios_base::sync_with_stdio(false);
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cin.tie(nullptr);
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int TC = 1;
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cin >> TC;
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cin.ignore();
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while (TC--) solve();
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} |