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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. #define MIN(x,y) (((x) < (y)) ? (x) : (y))
  5. void usd(char *str, int strl)
  6. {
  7. 	strl--;
  8. 	for (int i = 0; i <= strl / 2; i++)
  9. 	{
  10. 		char temp = str[i];
  11. 		str[i] = str[strl - i];
  12. 		str[strl - i] = temp;
  13. 	}
  14. }
  15.  
  16. int main()
  17. {
  18. 	char str[3][10006];
  19. 	int mcheck1 = 0, mcheck2 = 0;
  20.  
  21. 	scanf("%s", str[0]);
  22. 	scanf("%s", str[1]);
  23.  
  24. 	//절대값 비교
  25.  
  26. 	char * bignum;
  27. 	char * smallnum;
  28.  
  29. 	if (strlen(str[0]) > strlen(str[1]))
  30. 	{
  31. 		bignum = str[0];
  32. 		smallnum = str[1];
  33. 	}
  34. 	else if (strlen(str[0]) < strlen(str[1]))
  35. 	{
  36. 		bignum = str[1];
  37. 		smallnum = str[0];
  38. 	}
  39. 	else
  40. 	{
  41. 		if (strcmp(str[0], str[1]) > 0)
  42. 		{
  43. 			bignum = str[0];
  44. 			smallnum = str[1];
  45. 		}
  46. 		else
  47. 		{
  48. 			bignum = str[1];
  49. 			smallnum = str[0];
  50. 		}
  51. 	}
  52.  
  53. 	if (bignum[0] == '-') mcheck1 = 1;
  54. 	if (smallnum[0] == '-') mcheck2 = 1;
  55.  
  56. 	if ((mcheck1 + mcheck2) % 2 == 0)
  57. 	{
  58. 		usd(bignum, strlen(bignum));
  59. 		usd(smallnum, strlen(smallnum));
  60.  
  61. 		int i = 0;
  62. 		int carry = 0;
  63. 		for (; smallnum[i] <= '9' && smallnum[i] >= '0'; i++)
  64. 		{
  65. 			int a, b;
  66. 			a = smallnum[i] - '0';
  67. 			b = bignum[i] - '0';
  68. 			str[2][i] = (a + b + carry) % 10 + '0';
  69. 			if (a + b + carry > 9) carry = 1;
  70. 			else carry = 0;
  71. 		}
  72. 		for (; bignum[i] <= '9' && bignum[i] >= '0'; i++)
  73. 		{
  74. 			int a = bignum[i] - '0';
  75. 			str[2][i] = (a + carry) % 10 + '0';
  76. 			if (a + carry > 9) carry = 1;
  77. 			else carry = 0;
  78. 		}
  79. 		if (carry == 1) str[2][i++] = '1';
  80. 		if (mcheck1 == 1) str[2][i++] = '-';
  81. 		str[2][i] = '\0';
  82.  
  83. 		usd(str[2], strlen(str[2]));
  84.  
  85.  
  86. 	}
  87.  
  88. 	else
  89. 	{
  90. 		usd(bignum, strlen(bignum));
  91. 		usd(smallnum, strlen(smallnum));
  92.  
  93. 		int i = 0;
  94. 		int carry = 0;
  95.  
  96. 		for (; smallnum[i] <= '9' && smallnum[i] >= '0'; i++)
  97. 		{
  98. 			int a, b;
  99. 			a = smallnum[i] - '0';
  100. 			b = bignum[i] - '0';
  101. 			if (b - a - carry < 0)
  102. 			{
  103. 				b = b + 10 - a - carry;
  104. 				carry = 1;
  105. 			}
  106. 			else
  107. 			{
  108. 				b = b - a - carry;
  109. 				carry = 0;
  110. 			}
  111. 			str[2][i] = b + '0';
  112. 		}
  113. 		for (;  bignum[i] <= '9' && bignum[i] >= '0'; i++)
  114. 		{
  115. 			int b = bignum[i] - '0';
  116. 			if (b - carry < 0)
  117. 			{
  118. 				b = b + 10 - carry;
  119. 				carry = 1;
  120. 			}
  121. 			else
  122. 			{
  123. 				b = b - carry;
  124. 				carry = 0;
  125. 			}
  126. 			str[2][i] = b + '0';
  127. 		}
  128. 		while(str[2][i - 1] == '0') i--;
  129. 		if (mcheck1 == 1) str[2][i++] = '-';
  130. 		str[2][i] = '\0';
  131. 		usd(str[2], strlen(str[2]));
  132. 	}
  133. 	for(int i = 0; i < strlen(str[2]); i++)
  134. 	{
  135. 		if(str[2][i] == '-')
  136. 		{
  137. 			printf("%d", -1*(str[2][++i]-'0'));
  138. 			continue;
  139. 		}
  140. 			printf("%d", str[2][i]-'0');
  141. 	}
  142. 	return 0;
  143. }
Success #stdin #stdout 0s 9424KB
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https://ideone.com/IJJg91
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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