#include <stdio.h>
#include <stdint.h>
#include <string.h>

int main() {
	int32_t floor = 0;
	
	FILE *file = fopen("input", "r");
	if (file == NULL) {
		perror("Error opening file.");
		return 1;
	} 

	char buffer[256];
	while (fgets(buffer, sizeof(buffer), file) != NULL) {
		uint16_t length = strlen(buffer);
		for (uint16_t i = 0; i < length; i++) {
			if (buffer[i] == '(') floor++;
			else if(buffer[i] == ')') floor--;
		}
	}
	if (ferror(file)) {
		perror("Error reading from file.");
		return 1;
	}
    fclose(file);

	printf("floor: %i\n", floor);

	return 0;
}