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  1. #define _CRT_SECURE_NO_WARNINGS
  2. #include <stdio.h>
  3. #include <string.h>
  4. #include <stdlib.h>
  5.  
  6. typedef struct _stack {
  7. 	int top;
  8. 	char arr[51];
  9. }Stack;
  10.  
  11. void StackInit(Stack * pstack);
  12. void push(Stack * pstack, char data);
  13. char pop(Stack * pstack);
  14. int empty(Stack* pstack);
  15.  
  16. int main(void) {
  17. 	Stack stack;
  18. 	StackInit(&stack);
  19. 	char str[51];
  20. 	int T, len, det;
  21. 	scanf("%d", &T);
  22. 	for (int i = 1; i <= T; i++) {
  23. 		det = 1;
  24. 		scanf("%s", str);
  25. 		len = strlen(str);
  26. 		for (int j = 0; j < len; j++) {
  27. 			if (str[j] == '(')
  28. 				push(&stack, str[j]);
  29. 			else {
  30. 				if (empty(&stack)) {
  31. 					printf("NO\n");
  32. 					det = 0;
  33. 					break;
  34. 				}
  35. 				pop(&stack);
  36. 			}
  37. 		}
  38. 		if (empty(&stack) && det)
  39. 			printf("YES\n");
  40. 		else if(!empty(&stack) && det)
  41. 			printf("NO\n");
  42. 	}
  43. 	return 0;
  44. }
  45. void StackInit(Stack * pstack) {
  46. 	pstack->top = -1;
  47. }
  48. void push(Stack * pstack, char data) {
  49. 	pstack->top++;
  50. 	pstack->arr[pstack->top] = data;
  51. }
  52. char pop(Stack * pstack) {
  53. 	int data = pstack->arr[pstack->top];
  54. 	pstack->top--;
  55. 	return data;
  56. }
  57.  
  58. int empty(Stack* pstack) {
  59. 	if (pstack->top == -1)
  60. 		return 1;
  61. 	else
  62. 		return 0;
  63. }
  64.  
Success #stdin #stdout 0s 9424KB
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NO
YES
https://ideone.com/gEGXsr
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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