Problem 'sum' for the programming contest

sum.cpp

#include <iostream>
#include <vector>
#include <numeric>
#include <cstdio>

int main() {
    int set = 1;
    int num;

    while (true) {
        std::cin >> num;

        std::vector<int> v;

        if (num == 0)
            break;

        for (int i = 0; i < num; i++) {
            int n;
            std::cin >> n;
            v.push_back(n);
        }

        int total = 0;
        for (int i : v)
            total += i;
        std::cout << total << std::endl;

        total /= v.size();

        int count = 0;
        for (int i : v)
            count += std::abs(i - total);
        count /= 2;

        printf("Set #%d\nThe minimum number of moves is %d.\n", set, count);

        set++;
    }

    return 0;
}