#include <bits/stdc++.h> using namespace std; #define pb push_back #define pf push_front #define mp make_pair #define fi first #define se second #define int long long #define all(x) (x).begin(), (x).end() typedef long double ld; typedef long long ll; typedef pair<ll,ll> pll; typedef pair<int,int> pii; typedef vector<int> vi; typedef vector<ll> vll; typedef vector<bool> vb; typedef vector<vector<int>> vvi; typedef vector<vector<bool>> vvb; typedef vector<vector<ll>> vvll; typedef vector<string> vs; typedef vector<vector<string>> vvs; typedef vector<char> vc; typedef vector<vector<char>> vvc; typedef map<int, int> mii; typedef unordered_map<int, int> umii; const int mod = 1e9 + 7; const int inf = INTMAX_MAX; const bool tc = false; int n, d; int a[3001]; int query(int l, int r) { // modulo vi v(n); v[l] = (a[l] % d); for (int i = l + 1; i <= r; i++) { int vc = (a[i] % d); if (vc < v[i - 1]) vc += ((v[i - 1] - vc + (d - 1))/d) * d; v[i] = vc; if (vc > a[i]) return -1; } // for (int i = l; i <= r; i++) cout << v[i] << " "; // cout << '\n'; vi nxt(n, 1e18); for (int i = l; i <= r; i++) nxt[i] = a[i] - v[i]; // for (int i = l; i <= r; i++) cout << nxt[i] << " "; // cout << '\n'; vi suf(n); suf[n - 1] = nxt[n - 1]; for (int i = n - 2; i >= 0; i--) suf[i] = min(nxt[i], suf[i + 1]); int ans = 0; for (int i = l; i <= r; i++) ans += (nxt[i] - suf[i]) / d; return ans; } inline void solve() { cin >> n >> d; for (int i = 0; i < n; i++) cin >> a[i]; int q; cin >> q; while (q--) { int l, r; cin >> l >> r; l--; r--; cout << query(l, r) << '\n'; } } void setIO(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); } signed main() { ios::sync_with_stdio(false); cout.tie(0); cin.tie(0); //setIO(); int t = 1; if (tc) { cin >> t; } while (t--) { solve(); } }

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:75:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:76:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~