oj.uz

Submission #290882

# Submission time Handle Problem Language Result Execution time Memory
290882 2020-09-04T14:16:51 Z crossing0ver W (RMI18_w) C++17
20 / 100
 78 ms 5404 KB 
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define vi vector<int>
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
using namespace std;
int cnt[1000005],arr[300005];
main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	for (int i = 0; i< n; i++) {
		cin >> arr[i];
		cnt[arr[i]]++;
	}
	sort(arr,arr+n);
	reverse(arr,arr+n);
	if (arr[n-1] == arr[0]) {
		cout << 0;
		return 0;
	}
	for (int i = 1; i <= n; i++) {
		if (arr[i] != arr[i-1]) {
			ll left = i;
			ll right = n - left;
			if (left < 3 || right < 2) {
				cout << 0;
				return 0;
			}
			ll ans = 0;
			for (int i = 1; i <= left - 2; i++)
				ans += (left - i - 1);
			ans *= right - 1;
			cout << ans%(1000000007);
			return 0;
			
			
			
			
		}
	}
	int a[2] = {};
	int c= 0;
	ll ans = 1;
	for (int i = 1; i <= 1000000; i++) {
		if (cnt[i]) {
			c++;
			ans*=(cnt[i] - 1);
		}
	}
	cout << ans*(c/2);
		

}

Compilation message

w.cpp:11:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   11 | main() {
      |      ^
w.cpp: In function 'int main()':
w.cpp:46:6: warning: unused variable 'a' [-Wunused-variable]
   46 |  int a[2] = {};
      |      ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 7 ms 640 KB Output is correct
4 Correct 28 ms 1528 KB Output is correct

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Incorrect 11 ms 4352 KB Output isn't correct
4 Incorrect 27 ms 4708 KB Output isn't correct
5 Incorrect 42 ms 3092 KB Output isn't correct
6 Incorrect 78 ms 5404 KB Output isn't correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Incorrect 1 ms 384 KB Output isn't correct
3 Incorrect 0 ms 384 KB Output isn't correct
4 Incorrect 1 ms 384 KB Output isn't correct
5 Incorrect 1 ms 384 KB Output isn't correct
6 Incorrect 1 ms 384 KB Output isn't correct
7 Incorrect 2 ms 768 KB Output isn't correct
8 Incorrect 16 ms 1152 KB Output isn't correct
9 Incorrect 30 ms 1152 KB Output isn't correct
10 Incorrect 74 ms 5368 KB Output isn't correct