传送门

A. Single Push

直接乱搞即可。

Code

/*
 * Author:  heyuhhh
 * Created Time:  2019/11/16 22:36:20
 */
#include <bits/stdc++.h>
#define MP make_pair
#define fi first
#define se second
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define INF 0x3f3f3f3f
#define Local
#ifdef Local
  #define dbg(args...) do { cout << #args << " -> "; err(args); } while (0)
  void err() { std::cout << '\n'; }
  template<typename T, typename...Args>
  void err(T a, Args...args) { std::cout << a << ' '; err(args...); }
#else
  #define dbg(...)
#endif
void pt() {std::cout << '\n'; }
template<typename T, typename...Args>
void pt(T a, Args...args) {std::cout << a << ' '; pt(args...); }
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
//head
const int N = 1e5 + 5;
 
int n;
int a[N], b[N], c[N];
 
void run(){
    cin >> n;
    for(int i = 1; i <= n; i++) cin >> a[i];
    for(int i = 1; i <= n; i++) {
        cin >> b[i];
        c[i] = b[i] - a[i]; 
    }
    int cnt = 0;
    for(int i = 1; i <= n; i++) {
        if(c[i] < 0) return pt("NO");
    }
    int l = 1, r = n;
    while(l <= r && c[l] == 0) ++l;
    while(l <= r && c[r] == 0) --r;
    int ok = 1;
    for(int i = l + 1; i <= r; i++) if(c[i] != c[i - 1]) ok = 0;
    if(l > r || ok) return pt("YES");
    else return pt("NO");
}
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    cout << fixed << setprecision(20);
    int T; cin >> T;
    while(T--) run();
    return 0;
}