AtCoder Grand Contest 003

Submission #1365265

Source codeソースコード

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
struct __test {} test;
using namespace std;
template <typename T>const __test &operator<<(const __test& d,
const T& v) {return cerr << "\033[31m" << v << "\033[0m",d;}
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef long long ll;

const int N = 1e5+5;
int A[N],B[N],n;
map<int,int> loc;

int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> n;
	for(int i = 0; i < n; ++i) {
		cin >> A[i];
		B[i] = A[i];
	}
	sort(B,B+n);
	for(int i = 0; i < n; ++i)
		loc[B[i]] = i;
	int ans = 0;
	for(int i = 0; i < n; ++i) {
		ans += loc[A[i]]%2 != i%2;
	}
	cout << ans/2 << "\n";
}

Submission

Task問題 C - BBuBBBlesort!
User nameユーザ名 cephian
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 600
Source lengthソースコード長 721 Byte
File nameファイル名
Exec time実行時間 80 ms
Memory usageメモリ使用量 5760 KB

Test case

Set

Set name Score得点 / Max score Cases
Sample - s1.txt,s2.txt
All 600 / 600 01.txt,02.txt,03.txt,04.txt,05.txt,06.txt,07.txt,08.txt,09.txt,10.txt,11.txt,12.txt,13.txt,14.txt,15.txt,16.txt,17.txt,18.txt,19.txt,20.txt,21.txt,22.txt,s1.txt,s2.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
01.txt AC 79 ms 5760 KB
02.txt AC 80 ms 5760 KB
03.txt AC 74 ms 5760 KB
04.txt AC 78 ms 5760 KB
05.txt AC 76 ms 5760 KB
06.txt AC 76 ms 5760 KB
07.txt AC 75 ms 5760 KB
08.txt AC 43 ms 5760 KB
09.txt AC 43 ms 5760 KB
10.txt AC 41 ms 5760 KB
11.txt AC 41 ms 5760 KB
12.txt AC 43 ms 5760 KB
13.txt AC 44 ms 5760 KB
14.txt AC 73 ms 5760 KB
15.txt AC 72 ms 5760 KB
16.txt AC 69 ms 5760 KB
17.txt AC 68 ms 5760 KB
18.txt AC 1 ms 256 KB
19.txt AC 1 ms 256 KB
20.txt AC 1 ms 256 KB
21.txt AC 1 ms 256 KB
22.txt AC 1 ms 256 KB
s1.txt AC 1 ms 256 KB
s2.txt AC 1 ms 256 KB