Submission #814400

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
814400	2023-08-08T07:17:41 Z	박상훈(#10120)	Security Gate (JOI18_security_gate)	C++17	30 / 100	891 ms	340 KB

securitygate

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

constexpr int INF = 1e9 + 100;

char a[303], b[303];
int S[303], pos[606], pos2[606];

int ok2(int n, int l, int r){
	for (int i=l+1;i<=r;i++) b[i] = ((b[i]=='(')?')':'(');
	printf("ok2 -> %s\n", b+1);
	
	for (int i=1;i<=n;i++) S[i] = S[i-1] + ((b[i]=='(')?1:-1);
	return S[n]==0;
}

int ok(int n){
	int flag2 = 1;
	for (int i=1;i<=n;i++){
		S[i] = S[i-1] + ((b[i]=='(')?1:-1);
		if (S[i] < 0) flag2 = 0;
	} 
	if (S[n]==0 && flag2){
		return 1;
	} 
	if (S[n] < 0){
		for (int i=1;i<=n;i++) b[i] = ((b[i]=='(')?')':'(');
		reverse(b+1, b+n+1);
		return ok(n);
	}

	int lim = n, flag = 1;
	for (int i=1;i<=n;i++) if (S[i] < 0) {lim = i-1; break;}
	fill(pos, pos+n*2+2, INF);
	fill(pos2, pos2+n*2+2, INF);

	for (int i=n;i>=0;i--){
		if (i<=lim){
			int r = pos2[S[i]+(S[n]>>1)];
			if (r < pos[S[i]<<1|1]){
				// printf("ok %s -> flip %d %d\n", b+1, i, r);
				// assert(ok2(n, i, r));
				return 1;
			} 
		}

		if (S[i] < S[n]) flag = 0;
		pos[S[i]] = i;
		if (flag) pos2[S[i]] = i;
	}

	return 0;
}

int main(){
	int n;
	scanf("%d", &n);
	scanf("%s", a+1);
	for (int i=1;i<=n;i++) b[i] = a[i];

	if (n%2==1){printf("0\n"); return 0;}

	int cnt = 0;
	for (int i=1;i<=n;i++) if (a[i]=='x') cnt++;
	if (cnt > 20) return 0;

	int ans = 0;
	for (int z=0;z<(1<<cnt);z++){
		for (int i=1;i<=n;i++) b[i] = a[i];
		for (int i=1,j=0;i<=n;i++) if (a[i]=='x'){
			if (z&(1<<j)) b[i] = ')';
			else b[i] = '(';
			j++;
		}

		if (ok(n)) ans++;
		// printf("%s -> %d\n", b+1, ans);
	}

	printf("%d\n", ans);
}

Compilation message

securitygate.cpp: In function 'int main()':
securitygate.cpp:59:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
securitygate.cpp:60:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |  scanf("%s", a+1);
      |  ~~~~~^~~~~~~~~~~

Subtask #1
4.0 / 4.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	308 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	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 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	0 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	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	308 KB	Output is correct
17	Correct	1 ms	212 KB	Output is correct

Subtask #2
8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	308 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	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 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	0 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	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	308 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	312 KB	Output is correct
20	Correct	2 ms	212 KB	Output is correct
21	Correct	3 ms	212 KB	Output is correct
22	Correct	3 ms	284 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	5 ms	304 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	304 KB	Output is correct
27	Correct	3 ms	312 KB	Output is correct
28	Correct	2 ms	340 KB	Output is correct
29	Correct	1 ms	296 KB	Output is correct
30	Correct	1 ms	212 KB	Output is correct
31	Correct	3 ms	212 KB	Output is correct

Subtask #3
18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	308 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	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 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	0 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	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	308 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	312 KB	Output is correct
20	Correct	2 ms	212 KB	Output is correct
21	Correct	3 ms	212 KB	Output is correct
22	Correct	3 ms	284 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	5 ms	304 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	304 KB	Output is correct
27	Correct	3 ms	312 KB	Output is correct
28	Correct	2 ms	340 KB	Output is correct
29	Correct	1 ms	296 KB	Output is correct
30	Correct	1 ms	212 KB	Output is correct
31	Correct	3 ms	212 KB	Output is correct
32	Correct	10 ms	312 KB	Output is correct
33	Correct	3 ms	212 KB	Output is correct
34	Correct	272 ms	288 KB	Output is correct
35	Correct	9 ms	212 KB	Output is correct
36	Correct	49 ms	284 KB	Output is correct
37	Correct	213 ms	284 KB	Output is correct
38	Correct	891 ms	288 KB	Output is correct
39	Correct	9 ms	212 KB	Output is correct
40	Correct	804 ms	288 KB	Output is correct
41	Correct	622 ms	292 KB	Output is correct
42	Correct	829 ms	284 KB	Output is correct
43	Correct	409 ms	288 KB	Output is correct
44	Correct	41 ms	212 KB	Output is correct
45	Correct	800 ms	292 KB	Output is correct

Subtask #4
0 / 43.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	308 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	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 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	0 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	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	308 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	312 KB	Output is correct
20	Correct	2 ms	212 KB	Output is correct
21	Correct	3 ms	212 KB	Output is correct
22	Correct	3 ms	284 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	5 ms	304 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	304 KB	Output is correct
27	Correct	3 ms	312 KB	Output is correct
28	Correct	2 ms	340 KB	Output is correct
29	Correct	1 ms	296 KB	Output is correct
30	Correct	1 ms	212 KB	Output is correct
31	Correct	3 ms	212 KB	Output is correct
32	Correct	10 ms	312 KB	Output is correct
33	Correct	3 ms	212 KB	Output is correct
34	Correct	272 ms	288 KB	Output is correct
35	Correct	9 ms	212 KB	Output is correct
36	Correct	49 ms	284 KB	Output is correct
37	Correct	213 ms	284 KB	Output is correct
38	Correct	891 ms	288 KB	Output is correct
39	Correct	9 ms	212 KB	Output is correct
40	Correct	804 ms	288 KB	Output is correct
41	Correct	622 ms	292 KB	Output is correct
42	Correct	829 ms	284 KB	Output is correct
43	Correct	409 ms	288 KB	Output is correct
44	Correct	41 ms	212 KB	Output is correct
45	Correct	800 ms	292 KB	Output is correct
46	Correct	0 ms	212 KB	Output is correct
47	Correct	0 ms	212 KB	Output is correct
48	Correct	0 ms	212 KB	Output is correct
49	Incorrect	0 ms	212 KB	Output isn't correct
50	Halted	0 ms	0 KB	-

Subtask #5
0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	308 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	1 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	0 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	0 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	1 ms	212 KB	Output is correct
15	Correct	0 ms	212 KB	Output is correct
16	Correct	0 ms	308 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	312 KB	Output is correct
20	Correct	2 ms	212 KB	Output is correct
21	Correct	3 ms	212 KB	Output is correct
22	Correct	3 ms	284 KB	Output is correct
23	Correct	1 ms	212 KB	Output is correct
24	Correct	5 ms	304 KB	Output is correct
25	Correct	1 ms	212 KB	Output is correct
26	Correct	1 ms	304 KB	Output is correct
27	Correct	3 ms	312 KB	Output is correct
28	Correct	2 ms	340 KB	Output is correct
29	Correct	1 ms	296 KB	Output is correct
30	Correct	1 ms	212 KB	Output is correct
31	Correct	3 ms	212 KB	Output is correct
32	Correct	10 ms	312 KB	Output is correct
33	Correct	3 ms	212 KB	Output is correct
34	Correct	272 ms	288 KB	Output is correct
35	Correct	9 ms	212 KB	Output is correct
36	Correct	49 ms	284 KB	Output is correct
37	Correct	213 ms	284 KB	Output is correct
38	Correct	891 ms	288 KB	Output is correct
39	Correct	9 ms	212 KB	Output is correct
40	Correct	804 ms	288 KB	Output is correct
41	Correct	622 ms	292 KB	Output is correct
42	Correct	829 ms	284 KB	Output is correct
43	Correct	409 ms	288 KB	Output is correct
44	Correct	41 ms	212 KB	Output is correct
45	Correct	800 ms	292 KB	Output is correct
46	Correct	0 ms	212 KB	Output is correct
47	Correct	0 ms	212 KB	Output is correct
48	Correct	0 ms	212 KB	Output is correct
49	Incorrect	0 ms	212 KB	Output isn't correct
50	Halted	0 ms	0 KB	-

Submission #814400

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 8.0 / 8.0

Subtask #3 18.0 / 18.0

Subtask #4 0 / 43.0

Subtask #5 0 / 27.0

Subtask #1
4.0 / 4.0

Subtask #2
8.0 / 8.0

Subtask #3
18.0 / 18.0

Subtask #4
0 / 43.0

Subtask #5
0 / 27.0