oj.uz

Submission #175832

# Submission time Handle Problem Language Result Execution time Memory
175832 2020-01-07T11:26:46 Z Ruxandra985 Match (CEOI16_match) C++14
37 / 100
 2000 ms 8248 KB 
/// oare cat de bine merge in practica?
#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;
    if (!ok) /// nu mai are rost
        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) && 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;
    ok = 1;
    solve (1 , n);
    if (ok == 0){
        fprintf (fout,"%d\n",-1);
    }
    else {
        fputs (sol+1,fout);
    }
    return 0;
}

Compilation message

match.cpp: In function 'int main()':
match.cpp:54:11: 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:2:
In function 'char* fgets(char*, int, FILE*)',
    inlined from 'int main()' at match.cpp:54:11:
/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 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 3 ms 632 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 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 3 ms 632 KB Output is correct
7 Correct 4 ms 632 KB Output is correct
8 Correct 7 ms 1272 KB Output is correct
9 Correct 50 ms 1272 KB Output is correct
10 Correct 12 ms 1144 KB Output is correct
11 Correct 16 ms 1144 KB Output is correct
12 Correct 832 ms 6984 KB Output is correct
13 Correct 885 ms 7576 KB Output is correct
14 Execution timed out 2033 ms 8248 KB Time limit exceeded
15 Halted 0 ms 0 KB -