oj.uz

Submission #247438

# Submission time Handle Problem Language Result Execution time Memory
247438 2020-07-11T11:33:55 Z evpipis Match (CEOI16_match) C++11
100 / 100
 20 ms 12160 KB 
#include <bits/stdc++.h>
using namespace std;

const int len = 1e5+5, sig = 26;
char str[len], out[len];
int arr[len], dp[len][sig];
stack<int> mys;

bool check(int n){
    for (int i = 1; i <= n; i++){
        if (!mys.empty() && mys.top() == arr[i])
            mys.pop();
        else
            mys.push(arr[i]);
    }

    return (mys.empty());
}

void solve(int l, int r){
    if (l > r) return;
    int k = dp[r][arr[l]];

    //printf("l = %d, r = %d, k = %d\n", l, r, k);

    out[l] = '(';
    out[k] = ')';

    solve(l+1, k-1);
    solve(k+1, r);
}

int main(){
    scanf("%s", str);
    int n = strlen(str);

    for (int i = 1; i <= n; i++)
        arr[i] = str[i-1]-'a';

    if (!check(n)){
        printf("-1\n");
        return 0;
    }

    for (int i = 1; i <= n; i++){
        int k = dp[i-1][arr[i]];
        if (k > 0)
            for (int j = 0; j < sig; j++)
                dp[i][j] = dp[k-1][j];
        dp[i][arr[i]] = i;
    }

    solve(1, n);

    for (int i = 1; i <= n; i++)
        printf("%c", out[i]);
    printf("\n");
    return 0;
}

Compilation message

match.cpp: In function 'int main()':
match.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", str);
     ~~~~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 512 KB Output is correct
6 Correct 5 ms 512 KB Output is correct
7 Correct 5 ms 512 KB Output is correct
8 Correct 5 ms 1128 KB Output is correct
9 Correct 6 ms 1152 KB Output is correct
10 Correct 5 ms 1280 KB Output is correct
11 Correct 6 ms 1280 KB Output is correct
12 Correct 12 ms 7424 KB Output is correct
13 Correct 13 ms 8064 KB Output is correct
14 Correct 14 ms 8832 KB Output is correct
15 Correct 16 ms 10112 KB Output is correct
16 Correct 17 ms 10112 KB Output is correct
17 Correct 18 ms 10752 KB Output is correct
18 Correct 19 ms 10624 KB Output is correct
19 Correct 18 ms 11392 KB Output is correct
20 Correct 19 ms 7544 KB Output is correct
21 Correct 20 ms 12160 KB Output is correct