61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#define MAX_SIZE 1000
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bool is_valid_brackets(const char* s, int* err) {
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char stack[MAX_SIZE];
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int top = -1;
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for (int i = 0; s[i] != '\0'; i++) {
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char c = s[i];
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if (c == '(' || c == '[' || c == '{') {
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if (top < MAX_SIZE - 1) {
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stack[++top] = c;
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} else {
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*err= i + 1;
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return false;
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}
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}
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else if (c == ')' || c == ']' || c == '}') {
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if (top == -1) {
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*err= i + 1;
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return false;
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}
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char last = stack[top--];
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if ((c == ')' && last != '(') ||
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(c == ']' && last != '[') ||
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(c == '}' && last != '{')) {
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*err
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= i + 1;
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return false;
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}
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}
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}
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if (top != -1) {
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*err = strlen(s) + 1;
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return false;
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}
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return true;
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}
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int main() {
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char input[MAX_SIZE];
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if (fgets(input, MAX_SIZE, stdin) != NULL) {
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input[strcspn(input, "\n")] = '\0';
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int err = 0;
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if (is_valid_brackets(input, &err)) {
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printf("True\n");
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} else {
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printf("False at position %d\n", err
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);
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}
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}
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return 0;
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}
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