同时减去k后, 求最长连续子数组和为0的值即可 代码: using namespace std; typedef long long ll; typedef pair<ll, ll>PII; const int N = 2e5 + 10; const int MOD = 998244353; const int INF = 0X3F3F3F3F; const int dx[] = {-1, 1, 0, 0, -1, -1, +1, +1}; const int dy[] = {0, 0, -1, 1, -1, +1, -1, +1}; const int M = 1e6 + 1...