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#include <iostream>

#include <vector>

#include <algorithm>

using namespace std;

class Solution {

public:

bool isSubsequence(string s, string t) {

int idx = 0;

for (const auto& item:s)

{

while (idx<t.length() && t[idx]!=item)

++idx;

if (idx>=t.length())

return false;

else

++idx;

}

return true;

}

};

int main()

{

Solution solution;

cout << solution.isSubsequence("abc", "adfinefbkajlksdjflib");

return 0;

}