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답안 #587952

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
587952 2022-07-02T14:55:03 Z Blagojce Calvinball championship (CEOI15_teams) C++11
20 / 100
 1000 ms 596 KB 
#include <bits/stdc++.h>
#define fr(i, n, m) for(int i = (n); i < (m); i ++)
#define st first
#define nd second
#define pq priority_queue
#define all(x) begin(x), end(x)

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;

const int mxn = 2e5 + 5;
const ll  mod = 1e9 + 7;

int a[mxn];
int n;
	
	
ll C(int N, int K){
	if(N == 0) return 1;
	return C(N-1, K+1) + C(N-1, K)*K;
}
	
int main(){
	cin >> n;
	fr(i, 0, n){
		cin >> a[i];
	}
	
	int nxt = 2;
	ll ans = 1;
	fr(i, 0, n){
		
		int rem = n-i;
	
		ans += (a[i]-1) * C(rem-1, nxt-1);
		if(a[i] == nxt){
			nxt++;
		}
	}
	cout<<ans<<endl;
	
	
	
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 312 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1074 ms 212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1084 ms 212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1067 ms 212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1083 ms 340 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1087 ms 596 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1088 ms 468 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1093 ms 596 KB Time limit exceeded
2 Halted 0 ms 0 KB -