Submission #1701978


Source Code Expand

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#include <algorithm>
#include <iostream>
using namespace std;
int main(){
  string S;
  cin >> S;
  int l = S.length();
  string T;
  for(int i = 0; i < l; ++i){
    if(S[i] != 'x') T += S[i];
  }
  string T_rev = T;
  reverse(T_rev.begin(), T_rev.end());
  if(T != T_rev){
    cout << -1 << endl;
    return 0;
  }
  int i = 0, k = l-1, ans = 0;
  while(i < k){
    if(S[i] == 'x' && S[k] != 'x'){
      ++ans;
      ++i;
    }else if(S[k] == 'x' && S[i] != 'x'){
      ++ans;
      --k;
    }else{
      ++i;
      --k;
    }
  }
  cout << ans << endl;
  return 0;
}

Submission Info

Submission Time
Task C - Inserting 'x'
User TAB
Language C++14 (GCC 5.4.1)
Score 400
Code Size 602 Byte
Status
Exec Time 5 ms
Memory 640 KB

Test Cases

Set Name Score / Max Score Test Cases
Sample 0 / 0 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt
All 400 / 400 0_00.txt, 0_01.txt, 0_02.txt, 0_03.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt, 1_23.txt, 1_24.txt, 1_25.txt, 1_26.txt, 1_27.txt, 1_28.txt
Case Name Status Exec Time Memory
0_00.txt 1 ms 256 KB
0_01.txt 1 ms 256 KB
0_02.txt 1 ms 256 KB
0_03.txt 1 ms 256 KB
1_00.txt 1 ms 256 KB
1_01.txt 1 ms 256 KB
1_02.txt 1 ms 256 KB
1_03.txt 1 ms 256 KB
1_04.txt 1 ms 256 KB
1_05.txt 1 ms 256 KB
1_06.txt 5 ms 640 KB
1_07.txt 5 ms 512 KB
1_08.txt 5 ms 512 KB
1_09.txt 5 ms 512 KB
1_10.txt 5 ms 512 KB
1_11.txt 5 ms 512 KB
1_12.txt 5 ms 512 KB
1_13.txt 5 ms 512 KB
1_14.txt 5 ms 512 KB
1_15.txt 5 ms 512 KB
1_16.txt 4 ms 512 KB
1_17.txt 5 ms 512 KB
1_18.txt 4 ms 512 KB
1_19.txt 4 ms 512 KB
1_20.txt 4 ms 512 KB
1_21.txt 5 ms 512 KB
1_22.txt 5 ms 512 KB
1_23.txt 5 ms 512 KB
1_24.txt 5 ms 512 KB
1_25.txt 5 ms 512 KB
1_26.txt 5 ms 512 KB
1_27.txt 5 ms 512 KB
1_28.txt 5 ms 640 KB