Answers for POH5

question1.js

var line;
process.stdin.resume();
process.stdin.setEncoding('utf8');

process.stdin.on('data', function (chunk) {
  line = chunk.split("");
});

process.stdin.on('end', function () {
  var result = line.map(function(x, y){
    if(y === 0 || y % 2 === 0){
      return x;
    }
  });
  
  result.forEach(function(x){
    if(x !== undefined){
      process.stdout.write(x);
    }
  });
});

question2.js

var line;
process.stdin.resume();
process.stdin.setEncoding('utf8');

process.stdin.on('data', function (chunk) {
  line = chunk.split("\n");
});

process.stdin.on('end', function () {
  var result = [0,0,0,0,0,0,0];
  var days = parseInt(line[0]);
  for(i = 1; i <= days; i++){
    if(i%7 === 0){
      result[6] += parseInt(line[i]);
    }else{
      result[i%7 - 1] += parseInt(line[i]);
    }
  }
  result.forEach(function(x){
    process.stdout.write(x + '\n');
  })
});

question3.js

process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('end', function () {
  var x = 'MINAMI';
  process.stdout.write(x + '\n');
});

question4.js

process.stdin.resume();
process.stdin.setEncoding('utf8');

var line = [];

process.stdin.on('data', function (chunk) {
  line = chunk.split("\n");
});

process.stdin.on('end', function () {
  var firstLine = line.shift();
  var xy = firstLine.split(' ');
  var x = parseInt(xy[0]);
  var y = parseInt(xy[1]);
  
  var matrix = line.map(function(elem){
    return elem.split(' ');
  });
  
  var revMatrix = [];
  for(var a=0;a<x;a++){
    revMatrix.push([]);
  }

  for(var i=0;i<x;i++){
    for(var j=0;j<y;j++){
      if(matrix[j][i] != '2'){
        revMatrix[i].push(parseInt(matrix[j][i]));
      }else{
        revMatrix[i].push(0);
      }
    }
  }
  
  var sum = revMatrix.map(function(elem){
    return elem.reduce(function(x,y){
      return x+y;
    })
  });
  
  var falled = sum.map(function(elem){
    var bombedLine = [];
    for(var bomb=0;bomb<y;bomb++){
      if(bomb < elem){
        bombedLine.push(1);
      }else{
        bombedLine.push(0);
      }
    }
    return bombedLine.reverse();
  });
  
  var result = [];
  for(a=0;a<y;a++){
    result.push([]);
  }
  
  for(i=0;i<y;i++){
    for(j=0;j<x;j++){
      result[i].push(falled[j][i]);
    }
  }
  
  result.forEach(function(elem){
    process.stdout.write(elem.join(' ') + '\n');
  });
});