oj.uz

Submission #175872

# Submission time Handle Problem Language Result Execution time Memory
175872 2020-01-07T11:41:04 Z Ruxandra985 Match (CEOI16_match) C++14
37 / 100
 2000 ms 8800 KB 
#include <bits/stdc++.h>
#pragma GCC optimize "Ofast"
using namespace std;
int sp[30][100010];
char sol[100010] , s[100010];
int ok;
int stk[100010];
int match (int st , int dr){
    int i , elem = 0;
    if (st > dr)
        return 1;
    for (i=0;i<'z' - 'a';++i){
        if (((sp[i][dr] - sp[i][st-1]) & 1) == 1)
            return 0;
    }
 
    for (i=st;i<=dr;++i){
        if (stk[elem] == s[i])
            elem--;
        else stk[++elem] = s[i];
    }
    return (elem == 0);
 
}
void solve (int st , int dr){
    int i;
    if (st > dr)
        return;
    /// stii ca pe st pui ( , gaseste i match ul
 
    for (i = ( ( (dr & 1) != (st & 1) ) ? dr : dr - 1); i >= st + 1 ; i-=2){
        if (s[st] == s[i] && match(st + 1 , i - 1))
            break;
    }
    if (i < st + 1){
        ok = 0;
        return;
    }
    else {
        sol[st] = '(';
        sol[i] = ')';
        solve(st + 1 , i - 1);
        solve (i + 1 , dr);
    }
}
int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    int n , i;
    fgets (s+1 , 100010 , fin);
 
    n = 0;
    while ( 'a' <= s[n+1] && s[n+1] <= 'z' ){
        n++;
        s[n]-='a';
 
        for (i=0;i<='z'-'a';++i){
            sp[i][n] = sp[i][n-1] + (s[n] == i);
        }
    }
  	stk[0] = -1;
    if (!match(1 , n)){
        fprintf (fout,"-1");
        return 0;
    }
    
    ok = 1;
    solve (1 , n);
    fputs (sol+1,fout);
    return 0;
}

Compilation message

match.cpp: In function 'int main()':
match.cpp:51:11: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     fgets (s+1 , 100010 , fin);
     ~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:936:0,
                 from /usr/include/c++/7/cstdio:42,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:46,
                 from match.cpp:1:
In function 'char* fgets(char*, int, FILE*)',
    inlined from 'int main()' at match.cpp:51:11:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:261:58: warning: call to '__fgets_chk_warn' declared with attribute warning: fgets called with bigger size than length of destination buffer
  return __fgets_chk_warn (__s, __bos (__s), __n, __stream);
                                                          ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 3 ms 660 KB Output is correct
7 Correct 4 ms 632 KB Output is correct

Subtask #3
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 508 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 3 ms 660 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 6 ms 1188 KB Output is correct
9 Correct 44 ms 1272 KB Output is correct
10 Correct 10 ms 1328 KB Output is correct
11 Correct 16 ms 1388 KB Output is correct
12 Correct 785 ms 7892 KB Output is correct
13 Correct 866 ms 8792 KB Output is correct
14 Execution timed out 2043 ms 8800 KB Time limit exceeded
15 Halted 0 ms 0 KB -