Submission #1519996

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Source Code Expand

# include <iostream>
# include <algorithm>
# include <vector>
# include <string>
# include <set>
# include <map>
# include <cmath>
# include <iomanip>
# include <functional>
# include <utility>
# include <stack>
# include <queue>
# include <list>
# include <unordered_map>
constexpr int MOD = 1000000000 + 7;
constexpr int INF = 2000000000;
using namespace std;
typedef long long LL;

int main() {
	int ans = 0;
	int k, p;
	cin >> k >> p;
	int a;
	for (int i = 0; i < p; i++) {
		cin >> a;
		ans = max( ans,a - 1 - (k - a));
	}
	cout << ans << endl;
}

Submission Info

Judge Result