sagiii

const int NPIN = 2; // pin count
const int PINS[NPIN] = {2, 3}; // input pins

volatile long long t0 = 0, t[2] = {0};

void edge_function(int pin) {
  byte level = digitalRead(PINS[pin]);
  if(level && pin == 0) { // react to up edge of only pin 0.
    t0 = micros();
    Serial.print((int)t[0]);

sagiii

#include <EEPROM.h>
#define CLEAR_BUTTON (2)
#define MAX_LOG_N (120)

struct run_log_t {
    uint8_t last_index;
    uint16_t duration[MAX_LOG_N];
};

uint8_t index;