Miner Task

inputs = []
resos = {}

while True:
    resource = input()
    if resource == 'stop':
        break
    else:
        inputs.append(resource)

for i in range(0, len(inputs), 2):
    reso = inputs[i]
    if reso not in resos:
        resos[reso] = 0
    quantity =  int(inputs[i + 1])
    resos[reso] += quantity

[print(f"{x} -> {y}") for (x, y) in resos.items()]