Leimasin

input/code.cpp: In function 'int main()':
input/code.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int a = 0; a < s.length(); a++) t += "?";
                    ~~^~~~~~~~~~~~
input/code.cpp:21:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(s[i] != m[j] && j < m.length()) {
                               ~~^~~~~~~~~~~~
input/code.cpp:24:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(j == m.length()) break;
            ~~^~~~~~~~~~~~~
input/code.cpp:27:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(e > s.length() - m.length()) {
            ~~^~~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if(e > s.length() - m.length()) e = s.length() - m.length();...

#include <bits/stdc++.h>

using namespace std;

string s;
string m;
vector<int> v;
set<string> k;

int main()
{
    cin >> s >> m;
    string t;
    for(int a = 0; a < s.length(); a++) t += "?";
    int i = 0;
    int j = 0;
    while(t != s)   {
        while(t[i] == s[i]) {
            i++;
        }
        while(s[i] != m[j] && j < m.length()) {
            j++;
        }
        if(j == m.length()) break;
        int e = i - j;
        if(j > i) e = 0;
        if(e > s.length() - m.length()) {
            int c = m.length() - 1;
            while(m[c] != s[i] && c > 0) c--;
            e = i - c;
            if(e > s.length() - m.length()) e = s.length() - m.length();

        }
        t.replace(e, m.length(), m);
        if(k.find(t) != k.end()) break;
        if(find(v.begin(), v.end(), e + 1) == v.end()) {
            v.push_back(e + 1);
        }
        else    {
            v.erase(find(v.begin(), v.end(), e + 1));
            v.push_back(e+1);
        }
        k.insert(t);
        i = 0;
        j = 0;
    }
    if(t != s) cout << "-1";
    else {
        cout << v.size() << '\n';
        for(int b = 0; b < v.size(); b++)   {
            cout << v[b] << ' ';
        }
    }
    return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 1

Verdict: ACCEPTED

Test 7

Group: 1

Verdict: ACCEPTED

Test 8

Group: 1

Verdict: ACCEPTED

Test 9

Group: 1

Verdict: ACCEPTED

Test 10

Group: 1

Verdict: ACCEPTED

Test 11

Group: 1

Verdict: ACCEPTED

Test 12

Group: 1

Verdict: ACCEPTED

Test 13

Group: 1

Verdict: ACCEPTED

Test 14

Group: 1

Verdict: ACCEPTED

Test 15

Group: 2

Verdict: ACCEPTED

Test 16

Group: 2

Verdict: WRONG ANSWER

Test 17

Group: 2

Verdict: WRONG ANSWER

Test 18

Group: 2

Verdict: ACCEPTED

Test 19

Group: 2

Verdict: ACCEPTED

Test 20

Group: 2

Verdict: ACCEPTED

Test 21

Group: 2

Verdict: ACCEPTED

Test 22

Group: 2

Verdict: ACCEPTED

Test 23

Group: 2

Verdict: ACCEPTED

Test 24

Group: 2

Verdict: ACCEPTED

Test 25

Group: 2

Verdict: ACCEPTED

Test 26

Group: 2

Verdict: ACCEPTED

Test 27

Group: 2

Verdict: ACCEPTED

Test 28

Group: 2

Verdict: ACCEPTED

Test 29

Group: 3

Verdict: ACCEPTED

Test 30

Group: 3

Verdict: WRONG ANSWER

Test 31

Group: 3

Verdict: WRONG ANSWER

Test 32

Group: 3

Verdict: ACCEPTED

Test 33

Group: 3

Verdict: ACCEPTED

Test 34

Group: 3

Verdict: ACCEPTED

Test 35

Group: 3

Verdict: WRONG ANSWER

Test 36

Group: 3

Verdict: WRONG ANSWER

Test 37

Group: 3

Verdict: ACCEPTED

Test 38

Group: 3

Verdict: ACCEPTED

Test 39

Group: 3

Verdict: ACCEPTED

Test 40

Group: 3

Verdict: ACCEPTED

Test 41

Group: 3

Verdict: ACCEPTED

Test 42

Group: 3

Verdict: ACCEPTED