oj.uz

Submission #260544

# Submission time Handle Problem Language Result Execution time Memory
260544 2020-08-10T13:52:12 Z kimbj0709 Match (CEOI16_match) C++14
100 / 100
 32 ms 23288 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define maxn 100050
int lastpos[maxn][26];
string input;
vector<int> out(maxn,0);
int right(int r,char c){
  if(lastpos[r][c-'a']!=-1){
    return lastpos[r][c-'a'];
  }
  int ret = -1;
  if(r-2>=0&&input.at(r)==input.at(r-1)){
    if(input.at(r-2)==c){
      ret = r-2;
    }
    else{
      ret = right(r-2,c);
    }
  }
  else{
    int pos = right(r-1,input.at(r))-1;;
    if(input.at(pos)==c){
      ret = pos;
    }
    else{
      ret = right(pos,c);
    }
  }
  lastpos[r][c-'a'] = ret;
  return ret;
}
void recursive(int l,int r){
  if(l>=r){
    return;
  }
  if(input.at(l)==input.at(r)){
    out[r] = 1;
    recursive(l+1,r-1);
    return;
  }
  int pos = right(r,input.at(l));
  out[pos] = 1;
  recursive(l+1,pos-1);
  recursive(pos+1,r);
}
int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);cout.tie(0);
  cin >> input;
  stack<int> stack1;
  stack1.push(0);
  for(int i=1;i<input.length();i++){
    if(stack1.size()!=0&&input.at(stack1.top())==input.at(i)){
      stack1.pop();
    }
    else{
      stack1.push(i);
    }
  }
  if(stack1.size()!=0){
    cout << -1;
    return 0;
  }
  for(int i=0;i<26;i++){
    for(int j=0;j<input.length();j++){
      lastpos[j][i] = -1;
    }
  }
  recursive(0,input.length()-1);
  for(int i=0;i<input.length();i++){
    if(out[i]==1){
      cout << ')';
    }
    else{
      cout << '(';
    }
  }

}

Compilation message

match.cpp: In function 'int32_t main()':
match.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=1;i<input.length();i++){
               ~^~~~~~~~~~~~~~~
match.cpp:66:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0;j<input.length();j++){
                 ~^~~~~~~~~~~~~~~
match.cpp:71:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<input.length();i++){
               ~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1152 KB Output is correct
2 Correct 1 ms 1152 KB Output is correct
3 Correct 1 ms 1152 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1152 KB Output is correct
2 Correct 1 ms 1152 KB Output is correct
3 Correct 1 ms 1152 KB Output is correct
4 Correct 1 ms 1280 KB Output is correct
5 Correct 1 ms 1280 KB Output is correct
6 Correct 2 ms 1408 KB Output is correct
7 Correct 1 ms 1536 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1152 KB Output is correct
2 Correct 1 ms 1152 KB Output is correct
3 Correct 1 ms 1152 KB Output is correct
4 Correct 1 ms 1280 KB Output is correct
5 Correct 1 ms 1280 KB Output is correct
6 Correct 2 ms 1408 KB Output is correct
7 Correct 1 ms 1536 KB Output is correct
8 Correct 2 ms 2464 KB Output is correct
9 Correct 3 ms 2688 KB Output is correct
10 Correct 2 ms 2688 KB Output is correct
11 Correct 3 ms 2688 KB Output is correct
12 Correct 16 ms 14336 KB Output is correct
13 Correct 22 ms 15616 KB Output is correct
14 Correct 20 ms 16888 KB Output is correct
15 Correct 21 ms 17792 KB Output is correct
16 Correct 23 ms 17792 KB Output is correct
17 Correct 32 ms 19576 KB Output is correct
18 Correct 27 ms 19832 KB Output is correct
19 Correct 30 ms 21888 KB Output is correct
20 Correct 17 ms 14720 KB Output is correct
21 Correct 32 ms 23288 KB Output is correct