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

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////


function main() {
    var n = parseInt(readLine());
    var lenN = n/2;
    var arr = [];
    var deletedArr=[];
    for(var a0 = 0; a0 < n; a0++){

        var x_temp = readLine().split(' ');
        var x = [parseInt(x_temp[0]),x_temp[1]];

             arr = insertSort(arr,x);

          if (a0 < lenN){
             deletedArr.push(x);
              }


    }

    arr = dash(arr,deletedArr);
    stringArr = stringify(arr);
    console.log(stringArr);

    return stringArr;

}

function insertSort(array, values){
    var len = array.length -1;
    for(var i = 0; i <= len ; i++){
        if(array[i][0] > values[0]){
            array.splice(i,0,values);
             return array;

        }

    }
    array.push(values);
    return array;

}

function dash(arrayF, argCondition){
    var arrayFLen = arrayF.length;

    while(argCondition.length){
         for(var i = 0 ; i< arrayFLen; i++){
             if(JSON.stringify(arrayF[i]) == JSON.stringify(argCondition[0])){
                arrayF[i][1] = "-";
                argCondition.splice(0,1);
            }

        }
    }

    return arrayF;
}

function stringify(array){
    var text = "";
    for(var i = 0 ; i < array.length; i ++){
        text+= array[i][1] + " ";
    }

    return text;
}