Dictionary task in Python: Elections

Question

The first line gives the number of entries. Further, each entry contains the name of the candidate and the number of votes cast for him in one of the states. Summarize the results of the elections: for each candidate, determine the number of votes cast for him. Use dictionaries to complete the tasks.

Input: Number of voting records (integer number), then pairs <> - <>

Output: Print the solution of the problem.

Example:

Input:

5
McCain 10
McCain 5
Obama 9
Obama 8
McCain 1

Output:

McCain 16
Obama 17

My problem is at the step when I have to sum keys with same names but different values.

My code is:

cand_n = int(input()) 
count = 0 
countd = 0 
cand_list = [] 
cand_f = [] 
num = [] 
surname = [] 
edict = {} 
while count < cand_n: 
    cand = input() 
    count += 1 
    cand_f = cand.split(' ') 
    cand_list.append(cand_f) 
for k in cand_list: 
    for i in k: 
        if i.isdigit(): 
            num.append(int(i)) 
        else: surname.append(i) 
while countd < cand_n: 
    edict[surname[countd]] = num[countd] 
    countd += 1 
print(edict)