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- #include <bits/stdc++.h>
- // tiom4eg's precompiler options
- // POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS
- // IO settings
- #define fastIO ios_base::sync_with_stdio(false); cin.tie(0)
- // Quick types
- #define ll long long
- #define ld long double
- #define ull unsigned long long
- #define pii pair <int, int>
- #define vi vector <int>
- #define mi vector <vector <int>>
- // Quick functions
- #define endl "\n"
- #define F first
- #define S second
- #define all(a) a.begin(), a.end()
- #define sz(a) (int)(a.size())
- #define pb push_back
- #define mp make_pair
- // Quick fors
- #define FOR(i, a, b) for (int i = a; i < b; ++i)
- #define FORS(i, a, b, c) for (int i = a; i < b; i += c)
- #define RFOR(i, a, b) for (int i = a; i >= b; --i)
- #define EACH(e, a) for (auto& e : a)
- // Pragmas
- #ifndef TIOM4EG
- #pragma GCC optimize("O3") // let the chaos begin!
- #pragma GCC target("avx,avx2,bmi,bmi2,popcnt,lzcnt,tune=native")
- #pragma GCC comment(linker, "/stack:200000000")
- #endif
- // PBDS
- #include <ext/pb_ds/assoc_container.hpp>
- #include <ext/pb_ds/tree_policy.hpp>
- #define ordered_set tree <int, null_type, less <int>, rb_tree_tag, tree_order_statistics_node_update>
- #define ook order_of_key
- #define fbo find_by_order
- using namespace __gnu_pbds;
- // POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS POGGERS
- using namespace std;
- mt19937 rng(chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now().time_since_epoch()).count());
- #define int long long
- const int INF = 1e9 + 7, MD = 998244353, MAX = 100005, R = 1 << 19, MOD = 1e9 + 7, MOD2 = 1e9 + 9, MOD12 = MOD * MOD, MOD22 = MOD2 * MOD2, LG = 20, B1 = 300007, B2 = 107, B = 320;
- const ll INFLL = 1e18 + 7;
- int a[MAX];
- unordered_map <int, int> cnt[MAX / B + 1];
- signed main() {
- fastIO;
- int n, q; cin >> n >> q;
- FOR(i, 0, n) cin >> a[i], ++cnt[i / B][a[i] - i % B];
- while (q--) {
- int l, r, x, p, c = 0; cin >> l >> r >> x, --r, p = --l;
- while (p % B && p <= r) c += (a[p] == x + p - l), ++p;
- while (p + B <= r) {
- if (cnt[p / B].find(x + p - l) != cnt[p / B].end()) c += cnt[p / B][x + p - l];
- p += B;
- }
- while (p <= r) c += (a[p] == x + p - l), ++p;
- cout << c << endl;
- }
- }
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