solve these two tasks please

Task 1 Write a program in C++ that asks a user to enter a number and search for that number which is repeated from an integer data, use dynamic memory approach for the program. Calculate the size of the file then allocate the memory equal to the size of the file. Task 2 Write a program in C++, find 1st,2nd and 3rd maximum. Read the data from a file. The array used to read the data from the text file, should grow dynamically int by int. Example Data.txt: 2315189102155 Data: 2315189102155 Updated Data: 552115