Submission #590617

#	Time	Username	Problem	Language	Result	Execution time	Memory
590617		Do_you_copy	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	851 ms	92524 KiB

sortbooks

#include <bits/stdc++.h>
#define taskname "test"
#define fi first
#define se second
#define pb push_back
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
using namespace std;
using ll = long long;
using pii = pair <int, int>;
using pil = pair <int, ll>;
using pli = pair <ll, int>;
using pll = pair <ll, ll>;
using ull = unsigned ll;
mt19937 Rand(chrono::steady_clock::now().time_since_epoch().count());

ll min(const ll &a, const ll &b){
    return (a < b) ? a : b;
}

ll max(const ll &a, const ll &b){
    return (a > b) ? a : b;
}

//const ll Mod = 1000000009;
//const ll Mod2 = 999999999989;
//only use when required
const int maxN = 1e6 + 1;

int n, qq;
int a[maxN];

struct TQuery{
    int l, k, idx;
};
vector <TQuery> q[maxN];

int bit[maxN];
int ans[maxN];

void update(int x, int val){
    for (; x; x -= x & -x){
        bit[x] = max(bit[x], val);
    }
}

int get(int x, int val){
    int res = 0;
    for (; x <= n; x += x & -x){
        res = max(res, bit[x]);
    }
    return res;
}

void Init(){
    cin >> n >> qq;
    for (int i = 1; i <= n; ++i) cin >> a[i];
    for (int i = 1; i <= qq; ++i){
        int l, r, k;
        cin >> l >> r >> k;
        q[r].pb({l, k, i});
    }
    vector <int> S;
    for (int i = 1; i <= n; ++i){
        while (!S.empty() && a[S.back()] <= a[i]){
            S.pop_back();
        }
        if (!S.empty()){
            update(S.back(), a[i] + a[S.back()]);
        }
        S.pb(i);
        for (auto &j: q[i]){
            //from j -> i
            if (get(j.l, i) <= j.k) ans[j.idx] = 1;
            else ans[j.idx] = 0;
        }
    }
    for (int i = 1; i <= qq; ++i) cout << ans[i] << "\n";
}


int main(){
    if (fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
        //freopen(taskname".out", "w", stdout);
    }
    faster;
    ll tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:83:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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