제출 #978562

#제출 시각아이디문제언어결과실행 시간메모리
978562parlimoosTwo Antennas (JOI19_antennas)C++14
0 / 100
290 ms524292 KiB
//Be Name KHODA #pragma GCC optimize("Ofast") #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; #define pb push_back #define pp pop_back #define lb lower_bound #define ub upper_bound #define cl clear #define bg begin #define arr(x) array<int , x> #define endl '\n' const int root = 4000; const int inroot = 200000 / root; const int lg = int(log2(root)) + 1; int n , q , o[200000]; vector<arr(3)> a; vector<arr(2)> ops[200000]; vector<int> adds[200000] , dls[200000]; int sqrinf[inroot][2] , sqr[inroot][3]; int sqrprs[inroot][200000][lg][2][2]; bool lst[200000]; int trn = 0; int vls[200000]; void setMin(int &a , int b){ a = min(a , b); } void setMax(int &a , int b){ a = max(a , b); } void initSqr(){ fill(&vls[0] , &vls[n] , -1); for(int i = 0 ; i < 200000 ; i += root){ sqrinf[i / root][0] = i; sqrinf[i / root][1] = i + root - 1; } for(int i = 0 ; i < inroot ; i++){ for(int j = 0 ; j < n ; j++){ for(int bit = 0 ; bit < lg ; bit++){ for(int arw = 0 ; arw < 2 ; arw++){ sqrprs[i][j][bit][arw][0] = int(2e9); sqrprs[i][j][bit][arw][1] = -1; } } } } for(int i = 0 ; i < n ; i++){ if(a[i][1] > i) continue; int l = max(0 , i - a[i][2]) , r = i - a[i][1]; for(int sq = 0 ; sq < inroot ; sq++){ if(sqrinf[sq][0] < l) continue; if(sqrinf[sq][1] > r) break; for(int arw = 0 ; arw < 2 ; arw++){ setMin(sqrprs[sq][i][0][arw][0] , a[i][0]); setMax(sqrprs[sq][i][0][arw][1] , a[i][0]); } } } for(int sq = 0 ; sq < inroot ; sq++){ for(int i = 0 ; i < n ; i++){ for(int el = 1 , bit = 1 ; bit < lg and el <= i ; bit++ , el += el){ sqrprs[sq][i][bit][0][0] = sqrprs[sq][i][bit - 1][0][0]; setMin(sqrprs[sq][i][bit][0][0] , sqrprs[sq][i - el][bit - 1][0][0]); sqrprs[sq][i][bit][0][1] = sqrprs[sq][i][bit - 1][0][1]; setMax(sqrprs[sq][i][bit][0][1] , sqrprs[sq][i - el][bit - 1][0][1]); } } for(int i = n - 1 ; i >= 0 ; i--){ for(int el = 1 , bit = 1 ; bit < lg and i + el <= n - 1 ; bit++ , el += el){ sqrprs[sq][i][bit][1][0] = sqrprs[sq][i][bit - 1][1][0]; setMin(sqrprs[sq][i][bit][1][0] , sqrprs[sq][i + el][bit - 1][1][0]); sqrprs[sq][i][bit][1][1] = sqrprs[sq][i][bit - 1][1][1]; setMax(sqrprs[sq][i][bit][1][1] , sqrprs[sq][i + el][bit - 1][1][1]); } } } } int getMin(int sq , int l , int r){ int bit = int(log2(r - l + 1)); return min(sqrprs[sq][r][bit][0][0] , sqrprs[sq][l][bit][1][0]); } int getMax(int sq , int l , int r){ int bit = int(log2(r - l + 1)); return max(sqrprs[sq][r][bit][0][1] , sqrprs[sq][l][bit][1][1]); } void delSqr(int i){ int sq = i / root; lst[i] = 0 , sqr[sq][1] = int(2e9) , sqr[sq][2] = -1; int d1 = getMin(sq , i + a[i][1] , i + a[i][2]); int d2 = getMax(sq , i + a[i][1] , i + a[i][2]); setMax(vls[i] , max(a[i][0] - d1 , d2 - a[i][0])); for(int j = sqrinf[sq][0] ; j <= sqrinf[sq][1] ; j++){ if(!lst[j]) continue; setMin(sqr[sq][1] , a[j][0]) , setMax(sqr[sq][2] , a[j][0]);; } } void addSqr(int i){ int sq = i / root; lst[i] = 1; setMin(sqr[sq][1] , a[i][0]) , setMax(sqr[sq][2] , a[i][0]); } void updSqr(int l , int r , int val){ for(int sq = 0 ; sq < inroot ; sq++){ if(sqrinf[sq][0] > r) break; if(sqrinf[sq][1] < l) continue; if(sqrinf[sq][0] >= l and sqrinf[sq][1] <= r){ int d = max(val - sqr[sq][1] , sqr[sq][2] - val); setMax(sqr[sq][0] , d); }else{ for(int i = max(l , sqrinf[sq][0]) ; i <= min(r , sqrinf[sq][1]) ; i++){ if(!lst[i]) continue; setMax(vls[i] , abs(val - a[i][0])); setMax(sqr[sq][0] , vls[i]); } } } } int getSqr(int l , int r){ int res = -1; for(int sq = 0 ; sq < inroot ; sq++){ if(sqrinf[sq][0] > r) break; if(sqrinf[sq][1] < l) continue; if(sqrinf[sq][0] >= l and sqrinf[sq][1] <= r) setMax(res , sqr[sq][0]); else{ for(int i = max(l , sqrinf[sq][0]) ; i <= min(r , sqrinf[sq][1]) ; i++){ if(!lst[i]){ setMax(res , vls[i]); continue; } int d1 = getMin(sq , i + a[i][1] , min(i + a[i][2] , trn)); int d2 = getMax(sq , i + a[i][1] , min(i + a[i][2] , trn)); setMax(res , max({a[i][0] - d1 , d2 - a[i][0] , vls[i]})); } } } return res; } void f(){ for(trn = 0 ; trn < n ; trn++){ for(int &el : adds[trn]) addSqr(el); if(trn < a[trn][1]) continue; updSqr(max(0 , trn - a[trn][2]) , trn - a[trn][1] , a[trn][0]); for(auto op : ops[trn]){ o[op[1]] = getSqr(op[0] , trn); } for(int &el : dls[trn]) delSqr(el); } } int main(){ ios::sync_with_stdio(0); cin.tie(0); cin >> n; for(int i = 0 ; i < n ; i++){ a.pb({0 , 0 , 0}); cin >> a.back()[0] >> a.back()[1] >> a.back()[2]; if(i + a[i][1] < n){ adds[i + a[i][1]].pb(i); if(i + a[i][2] < n - 1) dls[i + a[i][2]].pb(i); } } cin >> q; for(int i = 0 ; i < q ; i++){ int l , r; cin >> l >> r; ops[r - 1].pb({l - 1 , i}); } initSqr() , f(); for(int i = 0 ; i < q ; i++) cout << o[i] << endl; }
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