符号配对pta

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#define max 200
char math[max];
int top = -1;

void Math(char left, char right) {
	if (top == -1) {
		if (right == '>') {
			printf("NO\n?-*/");
		} else {
			printf("NO\n?-%c", right);
		}
		exit(0);
	} 
	else if (left == math[top]) {
		top--;
	} 
	else {
		if (math[top] == '<') {
			printf("NO\n/*-?");
		} else {
			printf("NO\n%c-?", math[top--]);
		}
		exit(0);
	}
}

int main () {
	char str[max];
	while ((scanf("%s", str) != EOF && str[0] != '.')) {
		for (int i = 0; i < strlen(str); i++) {
			if (str[i] == '(' || str[i] == '{' || str[i] == '[') {
				math[++top] = str[i];
			} 
			else if (str[i] == '/' && str[i + 1] == '*') {
				math[++top] = '<';
				i++;
			} 
			else if (str[i] == ')')Math('(', str[i]);
			else if (str[i] == '}')Math('{', str[i]);
			else if (str[i] == ']')Math('[', str[i]);
			else if (str[i] == '*' && str[i+1] == '/') {
				Math('<', '>');
				i++;
			}
		}
	}
	if (top == -1)printf("YES\n");
	else {
		printf("NO\n%c-?", math[top--]);
	}
	return 0;
}