_a_color_box.cpp

#include <iostream>
#include <string>

using namespace std;

template <typename T> inline void inp (T &n) {
    n = 0;
    int ch = getchar_unlocked (), sign = 1;
    while (ch < '0' || ch > '9') {
        if (ch == '-') sign = -1;    // only if also negative integer
        ch = getchar_unlocked ();
    }
    while (ch >= '0' && ch <= '9')
        n = (n << 3) + (n << 1) + ch - '0', ch = getchar_unlocked ();
    n *= sign;   // only if also negative integer
}

inline int inp () {
    int n = 0;
    int ch = getchar_unlocked (), sign = 1;
    while (ch < '0' || ch > '9') {
        if (ch == '-') sign = -1;    // only if also negative integer
        ch = getchar_unlocked ();
    }
    while (ch >= '0' && ch <= '9')
        n = (n << 3) + (n << 1) + ch - '0', ch = getchar_unlocked ();
    n *= sign;   // only if also negative integer
    return n;
}

template <typename T> inline void puti (T n, char lc) {
    if (0 == n) {
        putchar_unlocked ('0');
        if (lc) putchar_unlocked (lc);
        return;
    }
    bool sign = false;
    if (n < 0) sign = true, n = -n;
    char s[20]; int rdi =-1;
    while (n) {
        s [++rdi] = '0' + n % 10;
        n /= 10;
    }
    if (sign) putchar_unlocked ('-');
    while (rdi >= 0) putchar_unlocked (s [rdi--]);
    if (lc) putchar_unlocked (lc);
}

inline void puts (string s) {
    for (char c : s) putchar_unlocked (c);
}

inline void inps (string &i) {
    i = "";
    char temp = getchar_unlocked ();
    while (temp == '\n' or temp == ' ') temp = getchar_unlocked ();
    while (temp != '\n' and temp != ' ' and temp != EOF) i += temp, temp = getchar_unlocked ();
}

inline void inpc (char &i) {
    char temp = getchar_unlocked ();
    while (temp == '\n' or temp == ' ') temp = getchar_unlocked ();
    if (temp != EOF) i = temp;
}

inline char inpc () {
    char temp = getchar_unlocked ();
    while (temp == '\n' or temp == ' ') temp = getchar_unlocked ();
    if (temp != EOF) return temp;
    else return '\n';
}

int main () {
    int i, t, n, df;
    long long hi;
    inp (t);
    while (t--) {
        inp (n);
        int a [n], b [n];
        for (i = 0; i < n; i++) inp (a [i]);
        for (i = 0; i < n; i++) inp (b [i]);
        hi = 0;
        for (i = 0; i < n; i++) {
            df = a [i] - b [i];
            if (df > 0) hi += df / 2;
            else hi += df;
        }
        if (hi < 0) puts ("No");
        else puts ("Yes");
    }
    return 0;
}