Submission #2700264


Source Code Expand

#include<bits/stdc++.h>
#define rep(i,a,b) for (int i=(a); i<=(b); i++)
#define per(i,a,b) for (int i=(a); i>=(b); i--)
using namespace std;
typedef long long LL;

const int maxn = 200005;
int c[maxn], p[maxn], n, cnt, t;
vector<int> pos[26];
char s[maxn];
LL ans;

#define lowbit(x) ((x)&(-(x)))
void update(int x) {
	for (; x<=n; x+=lowbit(x)) c[x]++;
}

int query(int x) {
	int res = 0;
	for (; x; x-=lowbit(x)) res += c[x];
	return res;
}

int main() {
	scanf("%s", s + 1);
	n = strlen(s + 1);
	rep (i, 1, n)
		pos[s[i]-'a'].push_back(i);
	rep (i, 0, 25) {
		int m = pos[i].size(), a = 0, b = m - 1;
		cnt += (m & 1);
		if (cnt >= 2) return puts("-1"), 0;
		while (a <= b) {
			p[pos[i][a]] = pos[i][b];
			a++; b--;
		}
	}
	rep (i, 1, n) if (p[i] && p[i] != i) {
		ans += query(p[i]) + query(i);
		update(p[i]);
	}
	else if (p[i] == i) t = i;
	if (n & 1) {
		rep (i, 1, n)
			if (i < t && p[i] < t || i > t && p[i] > t)
				ans++;
	}
	cout << ans << endl;
	
	return 0;
}

Submission Info

Submission Time
Task E - Papple Sort
User Cyanic
Language C++14 (GCC 5.4.1)
Score 0
Code Size 1025 Byte
Status WA
Exec Time 9 ms
Memory 2296 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:25:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", s + 1);
                    ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 800
Status
AC × 2
WA × 1
AC × 35
WA × 15
Set Name Test Cases
Sample s1.txt, s2.txt, s3.txt
All 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, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, 39.txt, 40.txt, 41.txt, 42.txt, 43.txt, 44.txt, 45.txt, 46.txt, 47.txt, s1.txt, s2.txt, s3.txt
Case Name Status Exec Time Memory
01.txt WA 8 ms 2176 KB
02.txt AC 8 ms 2176 KB
03.txt WA 8 ms 2176 KB
04.txt AC 8 ms 2176 KB
05.txt WA 8 ms 2176 KB
06.txt AC 8 ms 2176 KB
07.txt WA 8 ms 2048 KB
08.txt AC 8 ms 2176 KB
09.txt WA 9 ms 2176 KB
10.txt AC 8 ms 2176 KB
11.txt AC 3 ms 1792 KB
12.txt AC 3 ms 1792 KB
13.txt AC 3 ms 1792 KB
14.txt AC 3 ms 1792 KB
15.txt AC 7 ms 2164 KB
16.txt AC 7 ms 2164 KB
17.txt WA 8 ms 2292 KB
18.txt AC 8 ms 2164 KB
19.txt WA 8 ms 2136 KB
20.txt AC 3 ms 1780 KB
21.txt WA 8 ms 2116 KB
22.txt AC 8 ms 2164 KB
23.txt WA 7 ms 2168 KB
24.txt AC 3 ms 1656 KB
25.txt WA 7 ms 2164 KB
26.txt AC 7 ms 2164 KB
27.txt WA 7 ms 2164 KB
28.txt AC 7 ms 2168 KB
29.txt WA 8 ms 2164 KB
30.txt AC 3 ms 1780 KB
31.txt WA 8 ms 2164 KB
32.txt AC 3 ms 1780 KB
33.txt AC 7 ms 2296 KB
34.txt AC 3 ms 1528 KB
35.txt AC 7 ms 2296 KB
36.txt AC 3 ms 1784 KB
37.txt AC 3 ms 1740 KB
38.txt AC 3 ms 1904 KB
39.txt AC 8 ms 2164 KB
40.txt AC 3 ms 1740 KB
41.txt AC 1 ms 256 KB
42.txt AC 1 ms 256 KB
43.txt AC 1 ms 256 KB
44.txt WA 1 ms 256 KB
45.txt AC 1 ms 256 KB
46.txt AC 1 ms 256 KB
47.txt AC 1 ms 256 KB
s1.txt WA 1 ms 256 KB
s2.txt AC 1 ms 256 KB
s3.txt AC 1 ms 256 KB