#include <bits/stdc++.h>
using namespace std;
const long long MOD=1e9+7;
int Lonthunhi(vector<int> &a) {
int n=a.size();
sort(a.begin(),a.end());
for (int i=n-2;i>=0;i--) {
if (a[i]!=a[n-1]) {
return a[i]; // Dừng code lại!
}
}
// Nếu ko có số nào tm trả về -1!
return -1;
}
int main() {
vector<int> a = {36,67,69};
cout<<Lonthunhi(a);
return 0;
}
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