#include <stdio.h>
#include <setjmp.h>

int abs(int value) {
	jmp_buf buf;
	char buffer[16];
	snprintf(buffer, sizeof(buffer), "%d+", value);
	char *cursor = buffer;
	switch (setjmp(buf)) {
		case 0:
			++cursor;
			longjmp(buf, *cursor);
		case '-':
			*cursor = ' ';
			++cursor;
			longjmp(buf, *cursor);
		case '+':
			*cursor = '\0';
			sscanf(buffer, "%d", &value);
			return value;
		default:
			++cursor;
			longjmp(buf, *cursor);
	}
}

int main(void) {
	int value;
	while (1 == scanf("%d", &value)) {
		printf("%d\n", abs(value));
	}
	return 0;
}