Problem:
Score : 200 points

Problem Statement

Joisino is about to compete in the final round of a certain programming competition.
In this contest, there are N problems, numbered 1 through N.
Joisino knows that it takes her T_i seconds to solve problem i(1≦i≦N).

Also, there are M kinds of drinks offered to the contestants, numbered 1 through M.
If Joisino takes drink i(1≦i≦M), her brain will be stimulated and the time it takes for her to solve problem P_i will become X_i seconds.
It does not affect the time to solve the other problems.

A contestant is allowed to take exactly one of the drinks before the start of the contest.
For each drink, Joisino wants to know how many seconds it takes her to solve all the problems if she takes that drink.
Here, assume that the time it takes her to solve all the problems is equal to the sum of the time it takes for her to solve individual problems.
Your task is to write a program to calculate it instead of her.

Constraints

All input values are integers.

1≦N≦100

1≦T_i≦10^5

1≦M≦100

1≦P_i≦N

1≦X_i≦10^5

Input

The input is given from Standard Input in the following format:

N
T_1 T_2 ... T_N
M
P_1 X_1
P_2 X_2
:
P_M X_M

Output

For each drink, calculate how many seconds it takes Joisino to solve all the problems if she takes that drink, and print the results, one per line.

Sample Input 1

3
2 1 4
2
1 1
2 3

Sample Output 1

6
9

If Joisino takes drink 1, the time it takes her to solve each problem will be 1, 1 and 4 seconds, respectively, totaling 6 seconds.

If Joisino takes drink 2, the time it takes her to solve each problem will be 2, 3 and 4 seconds, respectively, totaling 9 seconds.

Sample Input 2

5
7 2 3 8 5
3
4 2
1 7
4 13

Sample Output 2

19
25
30

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io;
use std::io::BufRead;

fn read_int(n:&str) -> i32{
    n.parse().unwrap()
}

fn read_times(buff : &str) -> Vec <i32> {
    buff.split_whitespace().map(read_int).collect()
}

fn main(){
    // to increase its lifetime
    let stdin = io::stdin();
    let mut buff = stdin.lock().lines();
    // io::stdin().read_line(&mut buff) just *appends* the input.
    // we can use a function inside which each buff is created, but ..?
    // http://stackoverflow.com/questions/30186037/
    buff.next();
    let times = read_times(& buff.next().unwrap().unwrap()); // REALLY?
    let normal_time :i32 = times.iter().fold(0, |x, y|{x+y});
    // let normal_time :i32 = times.iter().sum();
    // `use of unstable library feature 'iter_arith':
    // `bounds recently changed (see issue #27739)`
    buff.next();
    for line in &mut buff {
        // slice pattern syntax is experimental
        let input : Vec<i32> = line.unwrap()
            .split_whitespace().map(read_int).collect();
        println!("{}",
                 normal_time + input[1] - times[(input[0] -1) as usize]);
    }
}