instructions = [l.split(" ") for l in open("input", "r").read().split("\n") if l]
instructions = [(operation, int(argument)) for (operation, argument) in instructions]
visited = set()
pc = 0
ac = 0
operations = {}

def operation(op):
    def wrap(func):
        operations[op] = func
    return wrap

@operation("acc")
def acc(p):
    global pc
    global ac
    ac += p
    pc += 1

@operation("jmp")
def jmp(p):
    global pc
    pc += p

@operation("nop")
def nop(p):
    global pc
    pc += 1

while pc not in visited:
    visited.add(pc)
    (opcode, p) = instructions[pc]
    print(pc, ac, opcode, p)
    op = operations[opcode]
    op(p)

print(ac)