Submission #1283465

#TimeUsernameProblemLanguageResultExecution timeMemory
1283465uranhishigBaloni (COCI15_baloni)C++20
0 / 100
223 ms7432 KiB
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(a) (a).begin(),(a).end()
#define rep(i, n) for(int i = 0; i < (n); i++)


signed main(){
	int n;
	cin >> n;
	vector<int> a(n);
	for (int i = 0; i < n; i++){
		cin >> a[i];
	}
	map<int, int> mp;
	int ans = 0;
	for (int i = 0; i < n; i++) {
		if(mp[a[i]] == 0) {
			ans++;
			mp[a[i]-1] = 1;
//			cout << "NEMEGDLEE" << endl;
		}
		else {
			mp[a[i]-1] = 1;
		}
	}
	cout << ans;
	return 0;
}
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