71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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void resort(char *a, int size) {
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int i;
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for(i = 0; i < size / 2; i++) {
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char c = a[i];
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a[i] = a[size - 1 - i];
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a[size - 1 - i] = c;
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}
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}
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int max(int a, int b) { return a > b ? a : b; }
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int main() {
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char *a, *b;
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char c[700];
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int i, mark = 0, a0 = 0, b0 = 0;
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a = (char* ) malloc (700 * sizeof(char));
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b = (char* ) malloc (700 * sizeof(char));
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for(i = 0; i < sizeof(c); i++)
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c[i] = '0';
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scanf("%s%s", a, b);
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if(a[0] == '-') {
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a0 = 1;
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a++;
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}
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if(b[0] == '-') {
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b0 = 1;
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b++;
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}
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resort(a, strlen(a));
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resort(b, strlen(b));
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int size = max(strlen(a), strlen(b));
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for(i = 0; i < size; i++) {
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if(i < strlen(a)) {
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if(!(a0 == b0) && a0)
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c[i] -= a[i] - '0';
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else
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c[i] += a[i] - '0';
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}
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if(i < strlen(b)) {
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if(!(a0 == b0) && b0)
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c[i] -= b[i] - '0';
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else
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c[i] += b[i] - '0';
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}
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c[i] += mark;
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mark = 0;
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if(c[i] > '9') {
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c[i] -= 10;
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mark = 1;
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}
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if(c[i] < '0') {
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c[i] += 10;
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mark = -1;
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}
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}
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for(i = size; i > 0; i--)
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if(c[i] != '0') break;
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if(mark < 0 || a0 && b0) printf("-");
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if(mark > 0) printf("1");
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for(; i >= 0; i--) {
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if(mark < 0 && (a0 != b0))
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c[i] = '9' - (c[i] - '0');
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printf("%c", c[i]);
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}
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free(a);
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free(b);
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return 0;
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}
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