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P5682 [CSP-J2019 江西] 次大值

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Baoshuo Ren 2020-12-30 18:39:46 +08:00 committed by Baoshuo Ren
parent e1bb425d87
commit b3c5de0cea
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 25 additions and 0 deletions
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problem/P5682/P5682.cpp Normal file
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#include <bits/stdc++.h>
using namespace std;
int n, t, a[200005];
int main() {
set<int> s;
cin >> n;
for (int i = 0; i < n; i++) {
cin >> t;
s.insert(t);
}
if (s.size() <= 1) {
cout << -1 << endl;
}
else {
t = 0;
for (int i : s) {
a[++t] = i;
}
cout << max(a[t - 2], a[t] % a[t - 1]) << endl;
}
return 0;
}