//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
#define mem(a,v) memset((a), (v), sizeof (a))
#define enl printf("\n")
#define case(t) printf("Case #%d: ", (t))
#define ni(n) scanf("%d", &(n))
#define nl(n) scanf("%I64d", &(n))
#define nai(a, n) for (int i = 0; i < (n); i++) ni(a[i])
#define nal(a, n) for (int i = 0; i < (n); i++) nl(a[i])
#define pri(n) printf("%d\n", (n))
#define prl(n) printf("%I64d\n", (n))
#define pii pair<int, int>
#define pil pair<int, long long>
#define pll pair<long long, long long>
#define vii vector<pii>
#define vil vector<pil>
#define vll vector<pll>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef cc_hash_table<ll,int,hash<ll>> ht;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> oset;
const double pi = acos(-1);
const int MOD = 1e9 + 7;
const int MOD2 = 1e9 + 9;
const int INF = 1e9 + 7;
const int MAXN = 1e5 + 5;
const double eps = 1e-9;
char str[MAXN];
int a[MAXN], nx[MAXN][26];
void solve(int l, int r) {
if (l > r) return;
if (str[l] == str[r]) {
a[l] = 0;
a[r] = 1;
solve(l+1, r-1);
return;
}
int mx = nx[r][str[l]-'a'];
assert(l <= mx);
a[mx] = 1;
solve(l+1,mx-1);
solve(mx+1,r);
}
int main() {
scanf("%s", str+1);
int n = strlen(str+1);
if (n & 1) return !printf("-1\n");
stack<int> st;
st.push(1);
mem(nx[1], -1);
nx[1][str[1]-'a'] = 1;
for (int i = 2; i <= n; i++) {
if (!st.empty() && str[i] == str[st.top()])
st.pop();
else
st.push(i);
for (int j = 0; j < 26; j++)
if (j == str[i] - 'a')
nx[i][j] = i;
else if (nx[i-1][str[i]-'a'] > 1)
nx[i][j] = nx[nx[i-1][str[i]-'a']-1][j];
else
nx[i][j] = -1;
}
if (!st.empty())
return !printf("-1\n");
solve(1, n);
for (int i = 1; i <= n; i++)
if (a[i])
printf(")");
else
printf("(");
return 0;
}
Compilation message
match.cpp: In function 'int main()':
match.cpp:57:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%s", str+1);
~~~~~^~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
504 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
504 KB |
Output is correct |
| 7 |
Correct |
2 ms |
504 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
504 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
504 KB |
Output is correct |
| 7 |
Correct |
2 ms |
504 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1016 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1148 KB |
Output is correct |
| 12 |
Correct |
13 ms |
6904 KB |
Output is correct |
| 13 |
Correct |
14 ms |
7416 KB |
Output is correct |
| 14 |
Correct |
16 ms |
8056 KB |
Output is correct |
| 15 |
Correct |
16 ms |
8952 KB |
Output is correct |
| 16 |
Correct |
16 ms |
9208 KB |
Output is correct |
| 17 |
Correct |
18 ms |
9592 KB |
Output is correct |
| 18 |
Correct |
19 ms |
10104 KB |
Output is correct |
| 19 |
Correct |
21 ms |
10744 KB |
Output is correct |
| 20 |
Correct |
14 ms |
7032 KB |
Output is correct |
| 21 |
Correct |
22 ms |
11384 KB |
Output is correct |
