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  1. Prepare
  2. Algorithms
  3. Warmup
  4. Birthday Cake Candles
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Birthday Cake Candles

  • apghr
     + 17 comments
    while(std::cin >> n)
        max < n ? c = !!(max = n) : c += max == n;

    can be translated as:

    while(std::cin >> n){ // for each candle n check:
    if(max < n) { // does n set a new record in height?
        max = n; // if that's so, then n is the new max height
        c = 1; // and the counter c must be set to 1 again. "!!" is a cheap trick to convert any value different from 0 into 1
    }
    else { // otherwise check if the new candle is as tall as max
        if (max == n)
            c++; // in that case, add 1 to counter (otherwise add 0)
    }
}