oj.uz

답안 #140569

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
140569 2019-08-03T14:57:24 Z ngot23 3단 점프 (JOI19_jumps) C++11
100 / 100
 1307 ms 99236 KB 
#include <bits/stdc++.h>
#define rep(i, a, b) for(int i=(a) ; i<=(b) ; ++i)
#define mp make_pair
#define pii pair<int, int>
#define PB push_back
#define F first
#define S second
#define Task ""
using namespace std;
template <typename T > inline void MIN(T &a, T b) { if(a>b) a=b; }
template <typename T > inline void MAX(T &a, T b) { if(a<b) a=b; }

const int N=500005;
int n, a[N], Q, ans[N];
vector <pii > query[N];
vector <int > v[N];
stack <int > s;

struct node {
    int ab, c, sum;
    node(int AB=0, int C=0, int SUM=0) {
        ab=AB, c=C, sum=SUM;
    }
};

node Merge(node L, node R) {
    return node(max(L.ab, R.ab), max(L.c, R.c), max(max(L.sum, R.sum), L.ab+R.c));
}

node t[N*4];

void updateC(int l, int r, int id, int pos) {
    if(l==r) {
        t[id].c=a[pos];
        t[id].sum=a[pos];
        return;
    }
    int mid=(r+l)>>1;
    if(pos<=mid) updateC(l, mid, id*2, pos);
    else updateC(mid+1, r, id*2+1, pos);
    t[id]=Merge(t[id*2], t[id*2+1]);
}

void updateAB(int l, int r, int id, int pos, int val) {
    if(l==r) {
        t[id].ab=max(t[id].ab, val);
        t[id].sum=t[id].ab+t[id].c;
        return;
    }
    int mid=(r+l)>>1;
    if(pos<=mid) updateAB(l, mid, id*2, pos, val);
    else updateAB(mid+1, r, id*2+1, pos, val);
    t[id]=Merge(t[id*2], t[id*2+1]);
}

node get(int l, int r, int id, int u, int v) {
    if(r<u||v<l) return node();
    if(u<=l&&r<=v) return t[id];
    int mid=(r+l)>>1;
    node L=get(l, mid, id*2, u, v);
    node R=get(mid+1, r, id*2+1, u, v);
    return Merge(L, R);
}

void setup() {
    cin >> n;
    rep(i, 1, n) cin >> a[i];
    cin >> Q;
    rep(i, 1, Q) {
        int l, r; cin >> l >> r;
        query[l].PB(mp(r, i));
    }
}

void pre() {
    rep(i, 1, n) {
        while(!s.empty()&&a[i]>a[s.top()]) {
            v[s.top()].PB(i);
            s.pop();
        }
        if(s.size()) v[s.top()].PB(i);
        s.push(i);
    }
}

void calc() {
    for(int i=n ; i ; --i) {
        updateC(1, n, 1, i);
        for(auto val:v[i]) if(2*val-i<=n) updateAB(1, n, 1, 2*val-i, a[i]+a[val]);
        for(auto P:query[i]) {
            ans[P.S]=get(1, n, 1, i, P.F).sum;
        }
    }
    rep(i, 1, Q) cout << ans[i] << '\n';
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    //freopen(Task".inp", "r", stdin);
    //freopen(Task".out", "w", stdout);
    setup();
    pre();
    calc();
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 47352 KB Output is correct
2 Correct 44 ms 47352 KB Output is correct
3 Correct 43 ms 47352 KB Output is correct
4 Correct 43 ms 47356 KB Output is correct
5 Correct 43 ms 47352 KB Output is correct
6 Correct 43 ms 47352 KB Output is correct
7 Correct 43 ms 47352 KB Output is correct
8 Correct 43 ms 47352 KB Output is correct
9 Correct 43 ms 47352 KB Output is correct
10 Correct 44 ms 47352 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 47352 KB Output is correct
2 Correct 44 ms 47352 KB Output is correct
3 Correct 43 ms 47352 KB Output is correct
4 Correct 43 ms 47356 KB Output is correct
5 Correct 43 ms 47352 KB Output is correct
6 Correct 43 ms 47352 KB Output is correct
7 Correct 43 ms 47352 KB Output is correct
8 Correct 43 ms 47352 KB Output is correct
9 Correct 43 ms 47352 KB Output is correct
10 Correct 44 ms 47352 KB Output is correct
11 Correct 458 ms 65420 KB Output is correct
12 Correct 447 ms 65400 KB Output is correct
13 Correct 447 ms 65400 KB Output is correct
14 Correct 459 ms 65332 KB Output is correct
15 Correct 450 ms 65528 KB Output is correct
16 Correct 454 ms 64760 KB Output is correct
17 Correct 450 ms 64760 KB Output is correct
18 Correct 451 ms 64760 KB Output is correct
19 Correct 444 ms 65500 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 207 ms 56312 KB Output is correct
2 Correct 155 ms 56056 KB Output is correct
3 Correct 154 ms 56952 KB Output is correct
4 Correct 208 ms 56396 KB Output is correct
5 Correct 207 ms 56312 KB Output is correct
6 Correct 201 ms 55672 KB Output is correct
7 Correct 201 ms 55672 KB Output is correct
8 Correct 199 ms 55544 KB Output is correct
9 Correct 203 ms 55872 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 44 ms 47352 KB Output is correct
2 Correct 44 ms 47352 KB Output is correct
3 Correct 43 ms 47352 KB Output is correct
4 Correct 43 ms 47356 KB Output is correct
5 Correct 43 ms 47352 KB Output is correct
6 Correct 43 ms 47352 KB Output is correct
7 Correct 43 ms 47352 KB Output is correct
8 Correct 43 ms 47352 KB Output is correct
9 Correct 43 ms 47352 KB Output is correct
10 Correct 44 ms 47352 KB Output is correct
11 Correct 458 ms 65420 KB Output is correct
12 Correct 447 ms 65400 KB Output is correct
13 Correct 447 ms 65400 KB Output is correct
14 Correct 459 ms 65332 KB Output is correct
15 Correct 450 ms 65528 KB Output is correct
16 Correct 454 ms 64760 KB Output is correct
17 Correct 450 ms 64760 KB Output is correct
18 Correct 451 ms 64760 KB Output is correct
19 Correct 444 ms 65500 KB Output is correct
20 Correct 207 ms 56312 KB Output is correct
21 Correct 155 ms 56056 KB Output is correct
22 Correct 154 ms 56952 KB Output is correct
23 Correct 208 ms 56396 KB Output is correct
24 Correct 207 ms 56312 KB Output is correct
25 Correct 201 ms 55672 KB Output is correct
26 Correct 201 ms 55672 KB Output is correct
27 Correct 199 ms 55544 KB Output is correct
28 Correct 203 ms 55872 KB Output is correct
29 Correct 1294 ms 93468 KB Output is correct
30 Correct 1122 ms 92792 KB Output is correct
31 Correct 1138 ms 94828 KB Output is correct
32 Correct 1307 ms 93304 KB Output is correct
33 Correct 1295 ms 93360 KB Output is correct
34 Correct 1285 ms 91068 KB Output is correct
35 Correct 1280 ms 90796 KB Output is correct
36 Correct 1275 ms 90700 KB Output is correct
37 Correct 1292 ms 92156 KB Output is correct
38 Correct 966 ms 99236 KB Output is correct
39 Correct 935 ms 99104 KB Output is correct
40 Correct 911 ms 95848 KB Output is correct
41 Correct 908 ms 95244 KB Output is correct
42 Correct 924 ms 95232 KB Output is correct
43 Correct 933 ms 97028 KB Output is correct
44 Correct 1014 ms 98424 KB Output is correct
45 Correct 1006 ms 98524 KB Output is correct
46 Correct 1029 ms 95240 KB Output is correct
47 Correct 990 ms 94784 KB Output is correct
48 Correct 1008 ms 94832 KB Output is correct
49 Correct 999 ms 97096 KB Output is correct
50 Correct 1108 ms 96420 KB Output is correct
51 Correct 1097 ms 96564 KB Output is correct
52 Correct 1113 ms 94056 KB Output is correct
53 Correct 1071 ms 93712 KB Output is correct
54 Correct 1077 ms 93692 KB Output is correct
55 Correct 1102 ms 95272 KB Output is correct