33 lines
572 B
C++
33 lines
572 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main() {
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int n;
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cin >> n;
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vector<int> count(81, 0);
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for (int i = 0; i < n; ++i) {
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int num;
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cin >> num;
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count[num]++;
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}
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for (int i = 1; i <= 80; ++i) {
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if (count[i] >= 2) {
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count[i + 1] += count[i] / 2;
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count[i] %= 2;
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}
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}
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int max_num = 0;
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for (int i = 1; i <= 80; ++i) {
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if (count[i] > 0) {
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max_num = i;
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}
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}
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cout << max_num << endl;
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return 0;
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}
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