ABC-poisto

input/code.cpp: In function 'int solve(std::__cxx11::string)':
input/code.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i+1 < s.size(); ++i) {
                  ~~~~^~~~~~~~~~
input/code.cpp:20:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 3; i <= s.size(); ++i) {
                  ~~^~~~~~~~~~~
input/code.cpp:22:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j = 0; i+j <= s.size(); ++j) {
                    ~~~~^~~~~~~~~~~
input/code.cpp:45:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 1; i <= s.size(); ++i) {
                  ~~^~~~~~~~~~~

#include <iostream>
#include <cstring>
#include <string>
using namespace std;
// CCAAABBBAA
// 
const int N_MAX = 101;
// length of the segment, start of the segment
int dp1[N_MAX][N_MAX];
int dp2[N_MAX];
int solve(string s) {
  memset(dp1, 0, sizeof(dp1));
  memset(dp2, 0, sizeof(dp2));
  for(int i = 0; i+1 < s.size(); ++i) {
    if(s[i] != s[i+1]) {
      dp1[2][i] = 1;
    }
  }
  // i is the length of the segment
  for(int i = 3; i <= s.size(); ++i) {
    // j is the start of the segment
    for(int j = 0; i+j <= s.size(); ++j) {
      if(dp1[i-2][j+1] && s[j] != s[j+i-1]) {
        dp1[i][j] = 1;
      }
      else {
        for(int k = 2; k+2 <= i; ++k) {
          if(dp1[k][j] && dp1[i-k][j+k]) {
            dp1[i][j] = 1;
            break;
          }
        }
      }
    }
  }
  /*
  for(int i = 0; i < s.size(); ++i) {
    for(int j = 0; j <= s.size(); ++j) {
      cout<<i<<' '<<j<<' '<<dp1[j][i]<<'\n';
    }
  }
  */
  // dp2[i] == the amount of characters that can
  // be removed from 0...i-1
  for(int i = 1; i <= s.size(); ++i) {
    dp2[i] = dp2[i-1];;
    for(int j = 0; j + 2 <= i; ++j) {
      if(dp1[i-j][j]) {
        dp2[i] = max(dp2[i], dp2[j] + i-j);
      }
    }
  }
  return dp2[s.size()];
}
int main() {
  int tt;
  cin>>tt;
  for(int xx = 0; xx < tt; ++xx) {
    string s;
    cin>>s;
    int ans = solve(s);
    cout<<ans<<endl;
  }
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED