제출 #993422

#제출 시각아이디문제언어결과실행 시간메모리
993422abczzFish 3 (JOI24_fish3)C++14
55 / 100
1174 ms122636 KiB
#include <iostream> #include <vector> #include <queue> #include <array> #define ll long long using namespace std; vector <ll> V; ll n, d, q, a, b, f, s, C[300000], L[300000], P[300000], H[300000], G[300000], bl[300000][19], ps[300000][19]; struct SegTree{ ll st[1200000]; void build(ll id, ll l, ll r) { if (l == r) { st[id] = H[l]; return; } ll mid = (l+r)/2; build(id*2, l, mid); build(id*2+1, mid+1, r); st[id] = min(st[id*2], st[id*2+1]); } ll query(ll id, ll l, ll r, ll ql, ll qr) { if (qr < l || r < ql) return 1e18; else if (ql <= l && r <= qr) return st[id]; ll mid = (l+r)/2; return min(query(id*2, l, mid, ql, qr), query(id*2+1, mid+1, r, ql, qr)); } }ST; int main() { cin >> n >> d; for (int i=0; i<n; ++i) { cin >> C[i]; L[i] = C[i] % d; if (i) P[i] = ((L[i]-L[i-1]+d) % d) + P[i-1]; H[i] = C[i]-P[i]; G[i] = H[i] + (i ? G[i-1] : 0); while (!V.empty()) { auto u = V.back(); if (H[u] >= H[i]) V.pop_back(); else break; } if (V.empty()) bl[i][0] = i; else { ps[i][0] = H[i] * (i-V.back()); bl[i][0] = V.back(); } //cout << i << " " << bl[i][0] << " " << ps[i][0] << endl; V.push_back(i); } ST.build(1, 0, n-1); for (int j=1; j<19; ++j) { for (int i=0; i<n; ++i) { bl[i][j] = bl[bl[i][j-1]][j-1]; ps[i][j] = ps[i][j-1] + (bl[i][j] != bl[i][j-1] ? ps[bl[i][j-1]][j-1] : 0); } } cin >> q; while (q--) { cin >> a >> b; --a, --b; if (ST.query(1, 0, n-1, a, b) < L[a]-P[a]) { cout << "-1\n"; continue; } f = 0; s = G[b] - (a ? G[a-1] : 0) + ((b-a+1) * (L[a]-P[a])); /*cout << s << endl; for (int i=0; i<n; ++i) { cout << H[i] + (L[a] - P[a]) << " "; } cout << endl;*/ for (int j=18; j>=0; --j) { if (bl[b][j] >= a) { f += ps[b][j]; b = bl[b][j]; } } f += (b-a+1) * H[b]; cout << (s - (f + ((b-a+1) * (L[a]-P[a]))))/d << '\n'; } }
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