#include <iostream>
#include <stdint.h>
#include <stdio.h>
using namespace std;

typedef uint8_t rssi_t;

int16_t cc1200_calc_rssidbm(rssi_t rssi) {
	#define RSSI_OFFSET 99
	int16_t dbm = 0;

	if(rssi >= 128) {
		dbm = 128 - rssi;
	} else {
		dbm = rssi;
	}

	dbm = dbm - RSSI_OFFSET;
	return dbm;
}

int main() {
	// your code goes here
	rssi_t rssi = 240;
	printf("dbm = : %d", cc1200_calc_rssidbm(rssi));
	return 0;
}