checker for K

#include <iostream>
#include <string>
#include <vector>
#include "testlib.h"

using namespace std;

vector<int> readUserAnswer(InStream& in) {
    vector<int> v;
    int size = in.readInt();
    in.skipBlanks();
    string numbers = in.readLine();
    string ku = in.readToken();

    stringstream ss(numbers);
    for (int buf; ss >> buf;) {
        v.push_back(buf);
    }

    if (size != v.size()) {
        quitf(_wa, "Incorrect user answer format: diff size");
    }
    if (ku != "ku!") {
        quitf(_wa, "Incorrect user answer format: incorrect ku!");
    }
    return v;
}


int main(int argc, char* argv[]) {
    registerTestlibCmd(argc, argv);

    int N = inf.readInt();
    vector<int> a(N, 0);
    for (int i = 0; i < N; ++i) {
        a[i] = inf.readInt();
    }
    int answer = ans.readInt();

    auto user = readUserAnswer(ouf);
    if (user.size() != answer) {
        quitf(_wa, "Incorrect answer: incorrect size");
    }
    for (int i = 0, j = 0; j < answer; ++j) {
        while (i < N && a[i] != user[j]) {
            i++;
        }
        if (i == N) {
            quitf(_wa, "Incorrect answer: incorrect seq");
        }
    }
    quitf(_ok, "ok");
    return 0;
}