oj.uz

Submission #716317

# Submission time Handle Problem Language Result Execution time Memory
716317 2023-03-29T15:54:44 Z rainboy Monochrome Points (JOI20_monochrome) C
100 / 100
 18 ms 7336 KB 
#include <stdio.h>

#define N	200000

long long max(long long a, long long b) { return a > b ? a : b; }

long long aa[N + 1], bb[N + 1];

void update(int l, int r, int a, int b) {
	aa[l] += a, bb[l] += b, aa[r + 1] -= a, bb[r + 1] -= b;
}

int main() {
	static char cc[N * 2 + 1];
	static int iiw[N * 2], iib[N * 2];
	int n, nw, nb, i, iw, ib, iwl, iwr, ibl, ibr, l, r;
	long long ans;

	scanf("%d%s", &n, cc);
	iwl = iwr = ib = 0;
	iwl = iwr = ib = iwl;
	nw = nb = 0;
	for (i = 0; i < n * 2; i++)
		if (cc[i] == 'W')
			iiw[nw++] = i;
		else
			iib[nb++] = i;
	for (i = 0; i < n; i++) {
		iiw[n + i] = n * 2 + iiw[i];
		iib[n + i] = n * 2 + iib[i];
	}
	for (iw = 0, ibl = 0, ibr = 0; iw < n; iw++) {
		while (ibl < n * 2 && iib[ibl] < iiw[n + iw] - n)
			ibl++;
		while (ibr < n * 2 && iib[ibr] < iiw[n + iw])
			ibr++;
		if (ibl < ibr) {
			l = (ibl - iw + n * 2) % n, r = (ibr - 1 - iw + n * 2) % n;
			if (l <= r)
				update(l, r, -1, r);
			else
				update(0, r, -1, r), update(l, n - 1, -1, n + r);
		}
	}
	for (ib = 0, iwl = 0, iwr = 0; ib < n; ib++) {
		while (iwl < n * 2 && iiw[iwl] <= iib[n + ib] - n)
			iwl++;
		while (iwr < n * 2 && iiw[iwr] < iib[n + ib])
			iwr++;
		if (iwl < iwr) {
			l = (ib - iwr + 1 + n * 2) % n, r = (ib - iwl + n * 2) % n;
			if (l <= r)
				update(l, r, 1, -l);
			else
				update(l, n - 1, 1, -l), update(0, r, 1, n - l);
		}
	}
	for (i = 1; i < n; i++)
		aa[i] += aa[i - 1], bb[i] += bb[i - 1];
	ans = 0;
	for (i = 0; i < n; i++)
		ans = max(ans, aa[i] * i + bb[i]);
	printf("%lld\n", ans);
	return 0;
}

Compilation message

monochrome.c: In function 'main':
monochrome.c:19:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |  scanf("%d%s", &n, cc);
      |  ^~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 288 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 292 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 292 KB Output is correct
29 Correct 0 ms 292 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 292 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 288 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 288 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 292 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 292 KB Output is correct
29 Correct 0 ms 292 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 292 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 288 KB Output is correct
34 Correct 1 ms 292 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 0 ms 288 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 292 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 0 ms 340 KB Output is correct
51 Correct 0 ms 340 KB Output is correct
52 Correct 1 ms 352 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 288 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 292 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 292 KB Output is correct
29 Correct 0 ms 292 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 292 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 288 KB Output is correct
34 Correct 1 ms 292 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 0 ms 288 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 292 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 0 ms 340 KB Output is correct
51 Correct 0 ms 340 KB Output is correct
52 Correct 1 ms 352 KB Output is correct
53 Correct 18 ms 7336 KB Output is correct
54 Correct 18 ms 7316 KB Output is correct
55 Correct 18 ms 7000 KB Output is correct
56 Correct 17 ms 7016 KB Output is correct
57 Correct 10 ms 7136 KB Output is correct
58 Correct 12 ms 7308 KB Output is correct
59 Correct 10 ms 6920 KB Output is correct
60 Correct 11 ms 7012 KB Output is correct
61 Correct 10 ms 7124 KB Output is correct
62 Correct 12 ms 7104 KB Output is correct
63 Correct 12 ms 6996 KB Output is correct
64 Correct 11 ms 7064 KB Output is correct
65 Correct 12 ms 6748 KB Output is correct
66 Correct 12 ms 6976 KB Output is correct
67 Correct 12 ms 6988 KB Output is correct
68 Correct 10 ms 6624 KB Output is correct
69 Correct 11 ms 7184 KB Output is correct
70 Correct 10 ms 6652 KB Output is correct
71 Correct 12 ms 7264 KB Output is correct
72 Correct 11 ms 7336 KB Output is correct
73 Correct 11 ms 7276 KB Output is correct