let input = ['9',
    'try',
    '1',
    'it',
    '2',
    '1',
    '1',
    '=',
    '52',
    '-10'];


let gets = this.gets || ((arr, index) => () => arr[index++])(input, 0);

let lines = +gets();
let sum = 0;
let resultStr = '';


    let newLine = gets();
    if(!isNaN(newLine)){
        sum += +newLine;

    }else if(isNaN(newLine)){
        resultStr = `${resultStr}-${newLine}`;
    }

for(let i = 0; i < lines - 1; i++){

    let nextLine = gets();
    if(nextLine === ''){
        continue;
    }

    if(!isNaN(newLine) && !isNaN(nextLine)){
        sum += +nextLine;
    }else if(isNaN(newLine) && isNaN(nextLine)){
        resultStr = `${resultStr}-${nextLine}`;
    }else if(!isNaN(newLine) && isNaN(nextLine)){
        console.log(sum);
        sum = 0;
        resultStr = `${resultStr}-${nextLine}`
    }else if(isNaN(newLine) && !isNaN(nextLine)){
        if(resultStr[0] === '-'){
        console.log(resultStr.slice(1,));
    }else{
        console.log(resultStr);
    }

        resultStr = '';
        sum += +nextLine;
    }
    newLine = nextLine
}
if(resultStr[0] === '-'){
    console.log(resultStr.slice(1,));
}else if(resultStr.length != 0){
    console.log(resultStr);
}
if(sum != 0){
    console.log(sum);
}

// if(resultStr === ''){
//     resultStr = 'no words';
//     console.log(resultStr);
//     console.log(sum);
// }else{
//     console.log(resultStr.slice(1,));
//     console.log(sum);
// }