oj.uz

Submission #407117

# Submission time Handle Problem Language Result Execution time Memory
407117 2021-05-18T13:51:40 Z 79brue Security Gate (JOI18_security_gate) C++14
30 / 100
 5000 ms 324 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n;
char s[102];
int pref[102];
int ans;

void dfs(int x){
    if(x == n+1){
        int firstNegative = 101, lastNegative = -1;
        for(int i=1; i<=n; i++) if(pref[i] < 0) firstNegative = min(firstNegative, i);
        for(int i=1; i<=n; i++) if(pref[i] - pref[n] < 0) lastNegative = i;

        if(pref[n] == 0 && lastNegative == -1){
            ans++;
            return;
        }

        bool able = 0;
        for(int i=1; i<=n && i<=firstNegative; i++){
            bool good = 0;
            for(int j=i; j<=n; j++){
                if(pref[j] > 2 * pref[i-1]) break;
                if(pref[n] - 2 * (pref[j] - pref[i-1]) == 0 && j > lastNegative){
                    good = 1;
                    break;
                }
            }
            if(good){
                able = 1;
                break;
            }
        }
        if(able) ans++;
        return;
    }
    if(s[x] == '(' || s[x] == ')'){
        pref[x] = pref[x-1] + (s[x] == '(' ? 1 : -1);
        dfs(x+1);
        return;
    }
    s[x] = '('; pref[x] = pref[x-1] + 1;
    dfs(x+1);
    s[x] = ')'; pref[x] = pref[x-1] - 1;
    dfs(x+1);
    s[x] = 'x';
    return;
}

int main(){
    scanf("%d %s", &n, s+1);
    if(n%2){
        printf("0");
        return 0;
    }
    dfs(1);
    printf("%d", ans);
}

Compilation message

securitygate.cpp: In function 'int main()':
securitygate.cpp:55:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |     scanf("%d %s", &n, s+1);
      |     ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 292 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 5 ms 204 KB Output is correct
22 Correct 7 ms 296 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 5 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 6 ms 288 KB Output is correct
28 Correct 2 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 2 ms 204 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 5 ms 204 KB Output is correct
22 Correct 7 ms 296 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 5 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 6 ms 288 KB Output is correct
28 Correct 2 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 2 ms 204 KB Output is correct
32 Correct 9 ms 204 KB Output is correct
33 Correct 3 ms 204 KB Output is correct
34 Correct 146 ms 288 KB Output is correct
35 Correct 7 ms 204 KB Output is correct
36 Correct 19 ms 204 KB Output is correct
37 Correct 89 ms 204 KB Output is correct
38 Correct 4651 ms 272 KB Output is correct
39 Correct 8 ms 292 KB Output is correct
40 Correct 311 ms 272 KB Output is correct
41 Correct 2997 ms 272 KB Output is correct
42 Correct 1148 ms 324 KB Output is correct
43 Correct 245 ms 272 KB Output is correct
44 Correct 34 ms 204 KB Output is correct
45 Correct 2729 ms 268 KB Output is correct

Subtask #4
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 5 ms 204 KB Output is correct
22 Correct 7 ms 296 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 5 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 6 ms 288 KB Output is correct
28 Correct 2 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 2 ms 204 KB Output is correct
32 Correct 9 ms 204 KB Output is correct
33 Correct 3 ms 204 KB Output is correct
34 Correct 146 ms 288 KB Output is correct
35 Correct 7 ms 204 KB Output is correct
36 Correct 19 ms 204 KB Output is correct
37 Correct 89 ms 204 KB Output is correct
38 Correct 4651 ms 272 KB Output is correct
39 Correct 8 ms 292 KB Output is correct
40 Correct 311 ms 272 KB Output is correct
41 Correct 2997 ms 272 KB Output is correct
42 Correct 1148 ms 324 KB Output is correct
43 Correct 245 ms 272 KB Output is correct
44 Correct 34 ms 204 KB Output is correct
45 Correct 2729 ms 268 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Execution timed out 5021 ms 204 KB Time limit exceeded
50 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 292 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 5 ms 204 KB Output is correct
22 Correct 7 ms 296 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 5 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 6 ms 288 KB Output is correct
28 Correct 2 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 2 ms 204 KB Output is correct
32 Correct 9 ms 204 KB Output is correct
33 Correct 3 ms 204 KB Output is correct
34 Correct 146 ms 288 KB Output is correct
35 Correct 7 ms 204 KB Output is correct
36 Correct 19 ms 204 KB Output is correct
37 Correct 89 ms 204 KB Output is correct
38 Correct 4651 ms 272 KB Output is correct
39 Correct 8 ms 292 KB Output is correct
40 Correct 311 ms 272 KB Output is correct
41 Correct 2997 ms 272 KB Output is correct
42 Correct 1148 ms 324 KB Output is correct
43 Correct 245 ms 272 KB Output is correct
44 Correct 34 ms 204 KB Output is correct
45 Correct 2729 ms 268 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Execution timed out 5021 ms 204 KB Time limit exceeded
50 Halted 0 ms 0 KB -