답안 #528259

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
528259	2022-02-19T18:30:35 Z	rainboy	Izbori (COCI22_izbori)	C	40 / 110	1034 ms	2604 KB

Main

#include <stdio.h>

#define N	200000
#define SMALL	2000

int main() {
	static int aa[N], kk[N + 1], cc[N * 2 + 1];
	int n, i, l, r, a, k, k_;
	long long cnt;

	scanf("%d", &n);
	for (i = 0; i < n; i++)
		scanf("%d", &aa[i]);
	if (n <= SMALL) {
		cnt = 0;
		for (l = 0; l < n; l++) {
			a = 0, k = 0;
			for (r = l; r < n; r++) {
				if (k == 0)
					a = aa[r], k++;
				else if (a == aa[r])
					k++;
				else
					k--;
				k_ = 0;
				for (i = l; i <= r; i++)
					if (aa[i] == a)
						k_++;
					else
						k_--;
				if (k_ > 0)
					cnt++;
			}
		}
	} else {
		k = 0;
		for (i = 0; i < n; i++)
			kk[i + 1] = kk[i] + (aa[i] == 1 ? 1 : -1);
		for (i = 0; i <= n; i++)
			cc[n + kk[i]]++;
		cnt = (long long) n * (n + 1) / 2;
		for (k = -n; k <= n; k++)
			cnt -= (long long) cc[n + k] * (cc[n + k] - 1) / 2;
	}
	printf("%lld\n", cnt);
	return 0;
}

Compilation message

Main.c: In function 'main':
Main.c:11:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
Main.c:13:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~

Subtask #1

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	4 ms	284 KB	Output is correct
4	Correct	4 ms	204 KB	Output is correct
5	Correct	4 ms	204 KB	Output is correct
6	Correct	4 ms	284 KB	Output is correct

Subtask #2

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	4 ms	284 KB	Output is correct
4	Correct	4 ms	204 KB	Output is correct
5	Correct	4 ms	204 KB	Output is correct
6	Correct	4 ms	284 KB	Output is correct
7	Correct	102 ms	272 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1012 ms	272 KB	Output is correct
10	Correct	1034 ms	280 KB	Output is correct
11	Correct	988 ms	292 KB	Output is correct
12	Correct	1012 ms	276 KB	Output is correct
13	Correct	1014 ms	280 KB	Output is correct
14	Correct	990 ms	272 KB	Output is correct
15	Correct	975 ms	204 KB	Output is correct
16	Correct	969 ms	280 KB	Output is correct
17	Correct	965 ms	280 KB	Output is correct

Subtask #3

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	1228 KB	Output is correct
2	Correct	15 ms	1624 KB	Output is correct
3	Correct	10 ms	1100 KB	Output is correct
4	Correct	16 ms	1700 KB	Output is correct
5	Correct	17 ms	1636 KB	Output is correct
6	Correct	21 ms	1764 KB	Output is correct
7	Correct	17 ms	1824 KB	Output is correct
8	Correct	19 ms	1740 KB	Output is correct
9	Correct	18 ms	1868 KB	Output is correct
10	Correct	18 ms	1744 KB	Output is correct
11	Correct	18 ms	2596 KB	Output is correct

Subtask #4

0 / 70.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	4 ms	284 KB	Output is correct
4	Correct	4 ms	204 KB	Output is correct
5	Correct	4 ms	204 KB	Output is correct
6	Correct	4 ms	284 KB	Output is correct
7	Correct	102 ms	272 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1012 ms	272 KB	Output is correct
10	Correct	1034 ms	280 KB	Output is correct
11	Correct	988 ms	292 KB	Output is correct
12	Correct	1012 ms	276 KB	Output is correct
13	Correct	1014 ms	280 KB	Output is correct
14	Correct	990 ms	272 KB	Output is correct
15	Correct	975 ms	204 KB	Output is correct
16	Correct	969 ms	280 KB	Output is correct
17	Correct	965 ms	280 KB	Output is correct
18	Correct	11 ms	1228 KB	Output is correct
19	Correct	15 ms	1624 KB	Output is correct
20	Correct	10 ms	1100 KB	Output is correct
21	Correct	16 ms	1700 KB	Output is correct
22	Correct	17 ms	1636 KB	Output is correct
23	Correct	21 ms	1764 KB	Output is correct
24	Correct	17 ms	1824 KB	Output is correct
25	Correct	19 ms	1740 KB	Output is correct
26	Correct	18 ms	1868 KB	Output is correct
27	Correct	18 ms	1744 KB	Output is correct
28	Correct	18 ms	2596 KB	Output is correct
29	Correct	26 ms	2604 KB	Output is correct
30	Incorrect	5 ms	912 KB	Output isn't correct
31	Halted	0 ms	0 KB	-