func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 0x3f3f3f3f;   const int MAXN = 2e5 + 5;   int n, k, d, ansL = 1, ansR = 1, top1, top2;   int a[MAXN], st1[MAXN], st2[MAXN];   map<int, int> lst;   namespace SegmentTree {   struct Tree {     int l, r;     int w, tag;   } tree[MAXN << 2];   void update(int k) { tree[k].w = min(tree[k << 1].w, tree[k << 1 | 1].w); }   void apply(int k, int val) {     tree[k].w += val;     tree[k].tag += val;   }   void down(int k) {     if (tree[k].tag != 0) {       apply(k << 1, tree[k].tag);       apply(k << 1 | 1, tree[k].tag);       tree[k].tag = 0;     }   }   void Build(int k, int l, int r) {     tree[k].l = l;     tree[k].r = r;     if (l == r) {       tree[k].w = l;       return;     }     int mid = (l + r) >> 1;     Build(k << 1, l, mid);     Build(k << 1 | 1, mid + 1, r);     update(k);   }   void Modify(int k, int l, int r, int val) {     if (tree[k].l >= l && tree[k].r <= r) {       apply(k, val);       return;     }     down(k);     int mid = (tree[k].l + tree[k].r) >> 1;     if (l <= mid) Modify(k << 1, l, r, val);     if (r > mid) Modify(k << 1 | 1, l, r, val);     update(k);   }   void Delete(int k, int x) {     if (tree[k].l == tree[k].r) {       tree[k].w = INF;       return;     }     down(k);     int mid = (tree[k].l + tree[k].r) >> 1;     if (x <= mid)       Delete(k << 1, x);     else       Delete(k << 1 | 1, x);     update(k);   }   int Query(int k, int l, int r, int x) {     if (tree[k].w > x) return INF;     if (tree[k].l == tree[k].r) return tree[k].l;     if (tree[k].l >= l && tree[k].r <= r) {       down(k);       if (tree[k << 1].w <= x)         return Query(k << 1, l, r, x);       else         return Query(k << 1 | 1, l, r, x);     } else {       down(k);       int mid = (tree[k].l + tree[k].r) >> 1;       int res;       if (l <= mid) {         res = Query(k << 1, l, r, x);         if (res != INF) return res;       }       if (r > mid) {         res = Query(k << 1 | 1, l, r, x);         if (res != INF) return res;       }       return -1;     }   }   }  // namespace SegmentTree   int main() {     scanf( %d%d%d , &n, &k, &d);     for (int i = 1; i <= n; i++) {       scanf( %d , &a[i]);       a[i] += INF;     }     if (d == 0) {       for (int i = 1; i <= n; i++) {         int l = i;         while (a[i] == a[i + 1] && i < n) i += 1;         if (i - l + 1 > ansR - ansL + 1) {           ansL = l;           ansR = i;         }       }       printf( %d %d n , ansL, ansR);       return 0;     }     SegmentTree::Build(1, 1, n);     int L = 1;     for (int R = 1; R <= n; R++) {       int tmp = L;       if (a[R] % d == a[R - 1] % d)         L = max(lst[a[R]] + 1, L);       else         L = R;       lst[a[R]] = R;       while (tmp < L) {         SegmentTree::Delete(1, tmp);         tmp += 1;       }       while (top1 && st1[top1] >= L && a[st1[top1]] >= a[R]) {         SegmentTree::Modify(1, max(L, st1[top1 - 1] + 1), st1[top1],                             a[st1[top1]] / d);         top1 -= 1;       }       SegmentTree::Modify(1, max(L, st1[top1] + 1), R, -a[R] / d);       st1[++top1] = R;       while (top2 && st2[top2] >= L && a[st2[top2]] <= a[R]) {         SegmentTree::Modify(1, max(L, st2[top2 - 1] + 1), st2[top2],                             -a[st2[top2]] / d);         top2 -= 1;       }       SegmentTree::Modify(1, max(L, st2[top2] + 1), R, a[R] / d);       st2[++top2] = R;       int pos = SegmentTree::Query(1, L, R, k + R);       if (R - pos + 1 > ansR - ansL + 1) {         ansL = pos;         ansR = R;       }     }     printf( %d %d n , ansL, ansR);     return 0;   }   