---

let massiv = [];
for (let i = 0; i<10000; i++){
massiv.push(0);
}

massiv[123]=1;
massiv[1234]=1;
massiv[3455]=1;

let test = true;
for(let y = 0; y<100;y++){
  		            for(let x = 0; x<100;x++){
  		                if(massiv[100*y+x] == 1){
  		                    test = false;
  		                }
  		            }
  		                if(test == true){
  		                    massiv.splice(y*100,100);
  		                }
  		                test = true;
  		        }
                
alert(massiv.length);