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void getAns(vector<string> & arr, vector<vector<int>> &queries){
	int n = arr.size();
	int prefixSum[26][totalSize]; //prefix[i][j] -> prefixSum of count of char i(a--z) till j(included)(0-n-1)
 
	for(int i = 0; i < totalSize; i++){
		prefixSum[letter][i] = (i==0 ? 0 : prefixSum[letter][i-1]);
 
		for(auto character: arr[i]){
			prefixSum[character - 'a'][i]++;
		}
	}
 
	//Query = {l,r,k}
	for(auto query: queries){ 
		int l = query[0], r = query[1], k = query[2];
		int curTotalCount = 0;
 
		for(int possibleAns = 0; possibleAns < 26; possibleAns++){
			curTotalCount += prefixSum[possibleAns][r] - (l==0 ? 0 : prefixSum[possibleAns][l-1]);
			if(curTotalCount >= k){
				cout << (possibleAns + 'a') << endl;
				break;
			}
		}
	} 
}

prog.cpp:2:13: error: variable or field ‘getAns’ declared void
 void getAns(vector<string> & arr, vector<vector<int>> &queries){
             ^~~~~~
prog.cpp:2:13: error: ‘vector’ was not declared in this scope
prog.cpp:2:20: error: ‘string’ was not declared in this scope
 void getAns(vector<string> & arr, vector<vector<int>> &queries){
                    ^~~~~~
prog.cpp:2:20: note: suggested alternative: ‘struct’
 void getAns(vector<string> & arr, vector<vector<int>> &queries){
                    ^~~~~~
                    struct
prog.cpp:2:30: error: ‘arr’ was not declared in this scope
 void getAns(vector<string> & arr, vector<vector<int>> &queries){
                              ^~~
prog.cpp:2:35: error: ‘vector’ was not declared in this scope
 void getAns(vector<string> & arr, vector<vector<int>> &queries){
                                   ^~~~~~
prog.cpp:2:42: error: ‘vector’ was not declared in this scope
 void getAns(vector<string> & arr, vector<vector<int>> &queries){
                                          ^~~~~~
prog.cpp:2:49: error: expected primary-expression before ‘int’
 void getAns(vector<string> & arr, vector<vector<int>> &queries){
                                                 ^~~

Standard output is empty