oj.uz

답안 #865646

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
865646 2023-10-24T12:59:33 Z prohacker 3단 점프 (JOI19_jumps) C++17
19 / 100
 4000 ms 23636 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double

using namespace std;

const int N = 2e5+10;
const int INF = INT_MAX;
const int mod = 1e9+7;

int n,a[N];
int t;
vector<pair<int,int>> q[N];
stack<int> st;
ll ans[500010],lazy[4*N];

struct Node{
    ll best,mx,Mx;

    Node() {};
    Node(ll _best, ll _mx, ll _Mx) {
        best = _best;
        mx = _mx;
        Mx = _Mx;
    };
}tree[4*N];

Node operator + (Node u, Node v) {
    Node res = u;
    res.best = max({res.best,u.mx+v.Mx,v.best});
    res.mx = max(res.mx,v.mx);
    res.Mx = max(res.Mx,v.Mx);
    return res;
}

void build(int id = 1, int l = 1, int r = n) {
    if(l == r) {
        tree[id].Mx = a[l];
        tree[id].best = a[l];
        return;
    }
    int mid = l + r >> 1;
    build(id << 1,l,mid);
    build(id << 1 | 1,mid+1,r);
    tree[id] = tree[id << 1] + tree[id << 1 | 1];
}

void down(int id, int l, int r) {
    ll t = lazy[id];
    if(t == 0) {
        return;
    }
    tree[id].mx = max(tree[id].mx,t);
    tree[id].best = tree[id].mx+tree[id].Mx;
    if(l < r) {
        lazy[id << 1] = max(lazy[id << 1],t);
        lazy[id << 1 | 1] = max(lazy[id << 1 | 1],t);
    }
    t = 0;
}

void update(int u, int v, ll val, int id = 1, int l = 1, int r = n) {
    down(id,l,r);
    if(u > v || l > r || r < u || v < l) {
        return;
    }
    if(l == r) {
        lazy[id] = val;
        down(id,l,r);
        return;
    }
    int mid = l + r >> 1;
    if(u <= mid) {
        update(u,v,val,id << 1,l,mid);
    }
    if(mid+1 <= v) {
        update(u,v,val,id << 1 | 1,mid+1,r);
    }
    tree[id] = tree[id << 1] + tree[id << 1 | 1];
}

Node get(int u, int v, int id = 1, int l = 1, int r = n) {
    if(u > v || l > r || r < u || v < l) {
        return {0,0,0};
    }
    if(u <= l && r <= v) {
        return tree[id];
    }
    int mid = l + r >> 1;
    return get(u,v,id << 1,l,mid)+get(u,v,id << 1 | 1,mid+1,r);
}

signed main()
{
    if (fopen("triplejump.inp", "r")) {
        freopen("triplejump.inp", "r", stdin);
        freopen("triplejump.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    for(int i = 1 ; i <= n ; i++) {
        cin >> a[i];
    }
    cin >> t;
    for(int i = 1 ; i <= t ; i++) {
        int l,r; cin >> l >> r;
        q[l].push_back({r,i});
    }
    build();
    for(int i = n ; i > 0 ; i--) {
        while(!st.empty() && a[st.top()] < a[i]) {
            update(2*st.top()-i,n,a[i]+a[st.top()]);
            st.pop();
        }
        if(!st.empty()) {
            update(2*st.top()-i,n,a[i]+a[st.top()]);
        }
        st.push(i);
        for(auto p:q[i]) {
            ans[p.second] = get(i,p.first).best;
        }
    }
    for(int i = 1 ; i <= t ; i++) {
        cout << ans[i] << '\n';
    }
    return 0;
}

Compilation message

jumps.cpp: In function 'void build(int, int, int)':
jumps.cpp:42:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'void update(int, int, long long int, int, int, int)':
jumps.cpp:72:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   72 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'Node get(int, int, int, int, int)':
jumps.cpp:89:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   89 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'int main()':
jumps.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |         freopen("triplejump.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:97:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |         freopen("triplejump.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 7256 KB Output is correct
2 Correct 1 ms 7256 KB Output is correct
3 Correct 1 ms 7260 KB Output is correct
4 Correct 1 ms 7256 KB Output is correct
5 Correct 2 ms 7260 KB Output is correct
6 Correct 2 ms 7260 KB Output is correct
7 Correct 2 ms 7256 KB Output is correct
8 Correct 1 ms 7512 KB Output is correct
9 Correct 2 ms 7256 KB Output is correct
10 Correct 2 ms 7260 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 7256 KB Output is correct
2 Correct 1 ms 7256 KB Output is correct
3 Correct 1 ms 7260 KB Output is correct
4 Correct 1 ms 7256 KB Output is correct
5 Correct 2 ms 7260 KB Output is correct
6 Correct 2 ms 7260 KB Output is correct
7 Correct 2 ms 7256 KB Output is correct
8 Correct 1 ms 7512 KB Output is correct
9 Correct 2 ms 7256 KB Output is correct
10 Correct 2 ms 7260 KB Output is correct
11 Correct 727 ms 23492 KB Output is correct
12 Correct 480 ms 23380 KB Output is correct
13 Correct 470 ms 23476 KB Output is correct
14 Correct 711 ms 23636 KB Output is correct
15 Correct 713 ms 23608 KB Output is correct
16 Correct 725 ms 22880 KB Output is correct
17 Correct 722 ms 22932 KB Output is correct
18 Correct 707 ms 22676 KB Output is correct
19 Correct 708 ms 23376 KB Output is correct

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 4019 ms 19108 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 7256 KB Output is correct
2 Correct 1 ms 7256 KB Output is correct
3 Correct 1 ms 7260 KB Output is correct
4 Correct 1 ms 7256 KB Output is correct
5 Correct 2 ms 7260 KB Output is correct
6 Correct 2 ms 7260 KB Output is correct
7 Correct 2 ms 7256 KB Output is correct
8 Correct 1 ms 7512 KB Output is correct
9 Correct 2 ms 7256 KB Output is correct
10 Correct 2 ms 7260 KB Output is correct
11 Correct 727 ms 23492 KB Output is correct
12 Correct 480 ms 23380 KB Output is correct
13 Correct 470 ms 23476 KB Output is correct
14 Correct 711 ms 23636 KB Output is correct
15 Correct 713 ms 23608 KB Output is correct
16 Correct 725 ms 22880 KB Output is correct
17 Correct 722 ms 22932 KB Output is correct
18 Correct 707 ms 22676 KB Output is correct
19 Correct 708 ms 23376 KB Output is correct
20 Execution timed out 4019 ms 19108 KB Time limit exceeded
21 Halted 0 ms 0 KB -