oj.uz

Submission #175878

# Submission time Handle Problem Language Result Execution time Memory
175878 2020-01-07T11:43:01 Z Ruxandra985 Match (CEOI16_match) C++14
37 / 100
 2000 ms 10360 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(i + 1 , dr))
            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 632 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 632 KB Output is correct
7 Correct 4 ms 676 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 632 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 632 KB Output is correct
7 Correct 4 ms 676 KB Output is correct
8 Correct 6 ms 1144 KB Output is correct
9 Correct 44 ms 1272 KB Output is correct
10 Correct 5 ms 1272 KB Output is correct
11 Correct 4 ms 1272 KB Output is correct
12 Correct 77 ms 7548 KB Output is correct
13 Correct 40 ms 8184 KB Output is correct
14 Correct 565 ms 8888 KB Output is correct
15 Correct 62 ms 10360 KB Output is correct
16 Correct 62 ms 10360 KB Output is correct
17 Execution timed out 2051 ms 9500 KB Time limit exceeded
18 Halted 0 ms 0 KB -