oj.uz

Submission #865649

# Submission time Handle Problem Language Result Execution time Memory
865649 2023-10-24T13:03:02 Z prohacker Triple Jump (JOI19_jumps) C++14
19 / 100
 4000 ms 23892 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")

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:44:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   44 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'void update(int, int, long long int, int, int, int)':
jumps.cpp:74:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   74 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'Node get(int, int, int, int, int)':
jumps.cpp:91:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   91 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'int main()':
jumps.cpp:98:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   98 |         freopen("triplejump.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:99:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |         freopen("triplejump.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 7260 KB Output is correct
2 Correct 2 ms 7260 KB Output is correct
3 Correct 2 ms 7260 KB Output is correct
4 Correct 2 ms 7260 KB Output is correct
5 Correct 1 ms 7260 KB Output is correct
6 Correct 1 ms 7260 KB Output is correct
7 Correct 1 ms 7260 KB Output is correct
8 Correct 2 ms 7256 KB Output is correct
9 Correct 1 ms 7260 KB Output is correct
10 Correct 1 ms 7260 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 7260 KB Output is correct
2 Correct 2 ms 7260 KB Output is correct
3 Correct 2 ms 7260 KB Output is correct
4 Correct 2 ms 7260 KB Output is correct
5 Correct 1 ms 7260 KB Output is correct
6 Correct 1 ms 7260 KB Output is correct
7 Correct 1 ms 7260 KB Output is correct
8 Correct 2 ms 7256 KB Output is correct
9 Correct 1 ms 7260 KB Output is correct
10 Correct 1 ms 7260 KB Output is correct
11 Correct 504 ms 23496 KB Output is correct
12 Correct 357 ms 23424 KB Output is correct
13 Correct 360 ms 23892 KB Output is correct
14 Correct 502 ms 23388 KB Output is correct
15 Correct 500 ms 23436 KB Output is correct
16 Correct 516 ms 22884 KB Output is correct
17 Correct 507 ms 22944 KB Output is correct
18 Correct 508 ms 22920 KB Output is correct
19 Correct 498 ms 23380 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4037 ms 18880 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 7260 KB Output is correct
2 Correct 2 ms 7260 KB Output is correct
3 Correct 2 ms 7260 KB Output is correct
4 Correct 2 ms 7260 KB Output is correct
5 Correct 1 ms 7260 KB Output is correct
6 Correct 1 ms 7260 KB Output is correct
7 Correct 1 ms 7260 KB Output is correct
8 Correct 2 ms 7256 KB Output is correct
9 Correct 1 ms 7260 KB Output is correct
10 Correct 1 ms 7260 KB Output is correct
11 Correct 504 ms 23496 KB Output is correct
12 Correct 357 ms 23424 KB Output is correct
13 Correct 360 ms 23892 KB Output is correct
14 Correct 502 ms 23388 KB Output is correct
15 Correct 500 ms 23436 KB Output is correct
16 Correct 516 ms 22884 KB Output is correct
17 Correct 507 ms 22944 KB Output is correct
18 Correct 508 ms 22920 KB Output is correct
19 Correct 498 ms 23380 KB Output is correct
20 Execution timed out 4037 ms 18880 KB Time limit exceeded
21 Halted 0 ms 0 KB -