Arduino problem

I must program a compression of a 13-bit code to an 8-bit code for an Arduino board, I declared ports 52 to 28 as inputs, and outputs 53 to 39, but when programming the only port of entry that works well is 53.

For example, I declared an array with the input ports and used the first entrada[0] and if the value is 1 active the output salida[0] and turn on them, but if I change to entrada[1] and leave the same output no longer works, but if I leave the same input and change the outputs the program works correctly.

int ledpin=47;
int inpin=52;

void setup() {
  pinMode(ledpin, OUTPUT);
  pinMode(inpin, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(inpin)==HIGH){
  digitalWrite(ledpin, HIGH);
  delay(1000);
  digitalWrite(ledpin, LOW);
  delay(1000);
  }

  else{
    digitalWrite(ledpin, LOW);
    }
}

So, the code does exactly what I want, but if for example inpin change it from port 52 to 50 it takes me directly as if the input was high and when I move the switch it does not do anything.