#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <cmath>
#include <cstdio>

int main() {
    int N;
    scanf("%d", &N);

    long long X[N], Y[N];
    for (int i = 0; i < N; i++) {
        scanf("%lld%lld", &X[i], &Y[i]);
    }

    long long ans = 0;
    constexpr long long mod = 998244353;

    for (int i = 0; i < N - 1; i++) {
        for (int j = i + 1; j < N; j++) {
            long long dist = abs(X[i] - X[j]) + abs(Y[i] - Y[j]);
            ans += dist * dist;
            ans %= mod;
        }
    }

    printf("%lld\n", ans);
}