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545 mateuszvis 1 
/*
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 * reads stdin and writes to stdout after upcasing
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 */
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#include <stdio.h>
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int main(void) {
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  int c;
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  while ((c = getchar()) != EOF) {
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    if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
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    putchar(c);
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  }
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  return(0);
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}