Submission #497911

#	Time	Username	Problem	Language	Result	Execution time	Memory
497911		Nalrimet	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	1465 ms	93456 KiB

sortbooks

#include<bits/stdc++.h>

//#pragma GCC optimization("g", on)
//#pragma GCC optimize ("inline")
//#pragma GCC optimization("03")
//#pragma GCC optimization("unroll-loops")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popused,abm,mmx,avx,tune=native")
using namespace std;

const int N = 1e6 + 5;
const long long inf = 2000000000;
#define ll long long
#define int long long

#define F first
#define S second
#define pb push_back

int n, m, a[N], l[N], r[N], k[N];
int t[4 * N], mx;
bool ans[N];
vector<int> v[N];

void update(int pos, int val, int tl = 1, int tr = n, int v = 1){
    if(tl == tr) {
        t[v] = max(t[v], val);
    }
    else{
        int tm = (tl + tr) / 2;
        if(pos <= tm) update(pos, val, tl, tm, v * 2);
        else update(pos, val, tm + 1, tr, v * 2 + 1);
        t[v] = max(t[v * 2], t[v * 2 + 1]);
    }
}

int get(int v, int tl, int tr, int l, int r){
    if(l <= tl && tr <= r) return t[v];
    if(l > tr || r < tl) return 0;
    int tm = (tl + tr) / 2;
    return max(get(v * 2, tl, tm, l, r), get(v * 2 + 1, tm + 1, tr, l, r));
}


 main() {

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n >> m;

    for(int i = 1; i <= n; ++i){
        cin >> a[i];
    }

    for(int i = 1; i <= m; ++i){
        cin >> l[i] >> r[i] >> k[i];
        v[r[i]].pb(i);
    }

    stack<int> st;
    st.push(0);
    a[0] = inf;

    for(int i = 1; i <= n; ++i){
        while(a[st.top()] <= a[i]) st.pop();
        if(st.top() != 0) update(st.top(), a[st.top()] + a[i]);
        st.push(i);
        for(auto to : v[i]){
            mx = get(1, 1, n, l[to], i);
            if(mx <= k[to]) ans[to] = 1;
        }
    }

    for(int i = 1; i <= m; ++i){
        cout << ans[i] << '\n';
    }
}

Compilation message (stderr)

sortbooks.cpp:46:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   46 |  main() {
      |  ^~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 23 / 23