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Submission #129981

# Submission time Handle Problem Language Result Execution time Memory
129981 2019-07-13T17:17:06 Z TadijaSebez Match (CEOI16_match) C++11
100 / 100
 20 ms 11640 KB 
#include <bits/stdc++.h>
using namespace std;
const int N=100050;
char s[N],ans[N];
int pre[N][26];
bool ok=1;
void Solve(int l, int r)
{
	if(l>r) return;
	int m=pre[r][s[l]-'a'];
	if(m<=l){ ok=0;return;}
	ans[l]='(';
	ans[m]=')';
	Solve(l+1,m-1);
	Solve(m+1,r);
}
int main()
{
	int n;
	scanf("%s",s+1);
	n=strlen(s+1);
	for(int i=1;i<=n;i++) for(int j=0;j<26;j++)
	{
        if(j==s[i]-'a') pre[i][j]=i;
        else if(pre[i-1][s[i]-'a']>0) pre[i][j]=pre[pre[i-1][s[i]-'a']-1][j];
        else pre[i][j]=0;
	}
	Solve(1,n);
	if(ok) printf("%s",ans+1);
	else printf("-1\n");
	return 0;
}

Compilation message

match.cpp: In function 'int main()':
match.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",s+1);
  ~~~~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 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 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 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 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 1016 KB Output is correct
9 Correct 4 ms 1144 KB Output is correct
10 Correct 3 ms 1144 KB Output is correct
11 Correct 3 ms 1144 KB Output is correct
12 Correct 12 ms 7160 KB Output is correct
13 Correct 13 ms 7800 KB Output is correct
14 Correct 15 ms 8412 KB Output is correct
15 Correct 15 ms 9848 KB Output is correct
16 Correct 15 ms 9776 KB Output is correct
17 Correct 16 ms 10360 KB Output is correct
18 Correct 17 ms 10232 KB Output is correct
19 Correct 18 ms 11000 KB Output is correct
20 Correct 12 ms 7288 KB Output is correct
21 Correct 20 ms 11640 KB Output is correct