#!/bin/python

with open("input", 'r') as input:
    code = [line.strip() for line in input.readlines()]
    visited = [False for _ in range(len(code) + 1)]
    acc = 0
    pointer = 0;
    
    while not visited[pointer]:
        instr = code[pointer].split(" ")

        visited[pointer] = True

        if instr[0] == "acc":
            acc += int(instr[1])
            pointer += 1
        elif instr[0] == "nop":
            pointer += 1
        elif instr[0] == "jmp":
            pointer += int(instr[1])
        
    print(acc)