function sumSeconds(input){
    let timeFirst = Number(input.shift());
    let timeSecond = Number(input.shift());
    let timeThird = Number(input.shift());

    let totalSeconds =  timeFirst + timeSecond + timeThird;

    let mins = Math.floor(totalSeconds / 60);
    let secs = totalSeconds % 60;

    if (secs < 10){
        console.log(`${mins}:0${secs}`);
    }
    else {
        console.log(`${mins}:${secs}`);
    }
}
sumSeconds([35,45,44]);