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

int main() {
	int32_t floor = 0;
	uint32_t pos = 0;

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

	char buffer[256];
	bool breakout = false;
	while (fgets(buffer, sizeof(buffer), file) != NULL) {
		uint16_t length = strlen(buffer);
		if (breakout) break;
		for (uint16_t i = 0; i < length; i++) {
			if (buffer[i] == '(') { 
				floor++; 
				pos++; 
			}
			else if (buffer[i] == ')') { 
				floor--; 
				pos++; 
			}

			if (floor == -1) { 
				breakout = true; 
				break; 
			}
		}
	}
	if (ferror(file)) {
		perror("Error reading form file.");
		return 1;
	}
	fclose(file);

	printf("position: %i\n", pos);

	return 0;
}