BZOJ4373: 算术天才⑨与等差数列(线段树 hash?)

#include<bits/stdc++.h> 
#define ull unsigned long long 
#define LL long long 
#define Fin(x) {freopen(#x".in","r",stdin);}
#define Fout(x) {freopen(#x".out","w",stdout);}
using namespace std;
const int MAXN = 4e6 + 10;
inline int read() {
    char c = getchar(); int x = 0, f = 1;
    while(c < '0' || c > '9') {if(c == '-') f = -1; c = getchar();}
    while(c >= '0' && c <= '9') x = x * 10 + c - '0', c = getchar();
    return x * f;
}
int N, M;
#define ls k << 1
#define rs k << 1 | 1
struct {
    int l, r, mn, mx;
    ull s, s2;
}T[MAXN];
void update(int k) {
    T[k].mn = min(T[ls].mn, T[rs].mn);
    T[k].mx = max(T[ls].mx, T[rs].mx);
    T[k].s  = T[ls].s + T[rs].s;
    T[k].s2 = T[ls].s2 + T[rs].s2;
}
void Build(int k, int ll, int rr) {
    T[k].l = ll; T[k].r = rr;
    if(ll == rr) {T[k].mn = T[k].mx = T[k].s = read(); T[k].s2 = T[k].s * T[k].s ; return ;}
    int mid = ll + rr >> 1;
    Build(ls, ll, mid); Build(rs, mid + 1, rr);
    update(k);
}
void Modify(int k, int p, int v) {
    if(T[k].l == T[k].r) {T[k].mn = T[k].mx = T[k].s = v; T[k].s2 = T[k].s * T[k].s; return ;}
    int mid = T[k].l + T[k].r >> 1;
    if(p <= mid) Modify(ls, p, v);
    if(p  > mid) Modify(rs, p, v);
    update(k);
}
int QueryMn(int k, int ql, int qr) {
    if(ql <= T[k].l && T[k].r <= qr) return T[k].mn;
    int mid = T[k].l + T[k].r >> 1;
    if(ql > mid) return QueryMn(rs, ql, qr);
    else if(qr <= mid) return QueryMn(ls, ql, qr);
    else return min(QueryMn(ls, ql, qr), QueryMn(rs, ql, qr));
}
int QueryMx(int k, int ql, int qr) {
    if(ql <= T[k].l && T[k].r <= qr) return T[k].mx;
    int mid = T[k].l + T[k].r >> 1;
    if(ql > mid) return QueryMx(rs, ql, qr);
    else if(qr <= mid) return QueryMx(ls, ql, qr);
    else return max(QueryMx(ls, ql, qr), QueryMx(rs, ql, qr));
}
ull QuerySum(int k, int ql, int qr) {
    if(ql <= T[k].l && T[k].r <= qr) return T[k].s;
    int mid = T[k].l + T[k].r >> 1;
    if(ql > mid) return QuerySum(rs, ql, qr);
    else if(qr <= mid) return QuerySum(ls, ql, qr);
    else return QuerySum(ls, ql, qr) + QuerySum(rs, ql, qr);
}
ull QuerySum2(int k, int ql, int qr) {
    if(ql <= T[k].l && T[k].r <= qr) return T[k].s2;
    int mid = T[k].l + T[k].r >> 1;
    if(ql > mid) return QuerySum2(rs, ql, qr);
    else if(qr <= mid) return QuerySum2(ls, ql, qr);
    else return QuerySum2(ls, ql, qr) + QuerySum2(rs, ql, qr);
}
signed main() {
    N = read(); M = read();
    Build(1, 1, N); 
    int GG = 0;
    while(M--) {
        int opt = read();
        if(opt == 1) {
            int x = read() ^ GG, y = read() ^ GG;
            Modify(1, x, y);
        } else {
            int l = read() ^ GG, r = read() ^ GG; ull k = read() ^ GG;
            ull n = r - l + 1, mn = QueryMn(1, l, r), mx = QueryMx(1, l, r);
            ull s = QuerySum(1, l, r), s2 = QuerySum2(1, l, r), ns = mn * n + n * (n - 1) * k / 2;
            ull gg = (6 * mn * mn * n) + (6 * mn * k * n * (n - 1))  + (k * k * (n - 1) * n * (2 * (n - 1) + 1)), 
                gg2 = 6 * s2;
            if((mx - mn == (r - l) * k) && 
               (mn * n + n * (n - 1) / 2 * k == s) &&
               (gg  == gg2)) puts("Yes"), GG++;
            else puts("No");
        }
    }
    return 0;
}
/*
5 3
1 3 2 5 6
2 2 2 23333
1 5 4
2 1 5 1
*/