38 lines
835 B
C
38 lines
835 B
C
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#include <stdio.h>
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#include <string.h>
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int main(void){
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int lena, lenb, i, k, count, bit = 0 ,zf = 1, aadd = 0, badd = 0;
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char a[128],b[128];
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short tmpc[1024];
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scanf("%s",a);
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scanf("%s",b);
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if(a[0] == '-') zf *= -1, aadd++;
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if(b[0] == '-') zf *= -1, badd++;
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lena = strlen(a);
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for(i = aadd; i < lena; i++) a[i] -= 48;
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lenb = strlen(b);
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for(i = badd; i < lenb; i++) b[i] -= 48;
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for(i = 0; i < 1024; i++) tmpc[i] = 0;
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for(i = lenb-1; i >= badd; i--){
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count = 0;
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for(k = lena-1; k >= aadd; k--){
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tmpc[bit+count++] += a[k] * b[i];
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}
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count = 0;
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for(k = bit; k < 1024; k++){
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tmpc[k+1] += tmpc[k] / 10;
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tmpc[k] %= 10;
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}
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bit++;
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}
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int if_zero = 1;
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if(!~zf) printf("-");
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for(i = 1023; ~i; i--){
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if(tmpc[i] != 0 && if_zero) if_zero = 0;
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if(!if_zero) printf("%d",tmpc[i]);
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}
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printf("\n");
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return 0;
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}
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