19 lines
291 B
C
19 lines
291 B
C
int getchar();
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int is_digit(int ch) {
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return '0' <= ch && ch <= '9';
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}
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int parse_int(int ch) {
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int num = ch - '0';
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while (is_digit(ch = getchar())) {
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num = num * 10;
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num = num + ch - '0';
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}
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return num;
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}
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int main() {
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return parse_int(getchar());
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} |