int main() {
    unsigned int arrCount, queryCount;
    cin >> arrCount >> queryCount;
    
    vector<vector<unsigned int>> numArrs(arrCount);
    
    unsigned int arrSize = 0;
    unsigned int arrVal = 0;
    
    // Input all number arrays
    for (int i = 0; i < arrCount; i++) {
        cin >> arrSize;
        for (int j = 0; j < arrSize; j++) {
            cin >> arrVal; 
            numArrs[i].push_back(arrVal);
        }
    }
    unsigned int whichArr, indexArr;
    // Query the arrays
    // Query = [arr_num, arr_idx]
    for (int i = 0; i < queryCount; i++) {
        cin >> whichArr >> indexArr;
        cout << numArrs[whichArr].at(indexArr) << '\n';
    }
      
    return 0;
}

// TIME COMPLEXITY
// Input phase: O(N)
// Query phase: O(Q) as .at() is constant

// SPACE COMPLEXITY
// O(N) - took no location of array in memory