How to take inputs without knowing size of array

#1

can u explain how to take inputs in this question

#2

Hello @kunal132k
take input as string then split extract integers and store them in array.
you can take input in this way.
Happy Learning!!

#3

#include<bits/stdc++.h>
using namespace std;
vector split (const string &s, char delim) {
vector result;
stringstream ss (s);
string item;

while (getline (ss, item, delim)) {
    result.push_back (item);
}

return result;

}
int main() {
string input;
cin>>input;
string s = input.substr(1,input.length()-2);
//cout<<s;
vector v = split (s, ‘,’);
int k;
cin>>k;
int n=v.size();
int prefix[n];
int sum=0;
for(int i=0;i<n;i++){
string number = v[i];
int num = stoi(number);
sum += num;
prefix[i]=sum;
}

#4

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