Submission #1276441

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276441		nanaseyuzuki	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++20	100 / 100	565 ms	63668 KiB

sortbooks

#include <bits/stdc++.h>
// Author: Kazuki_Will_Win_VOI_8703
#define fi first
#define se second
#define pii pair<int, int>
#define ll long long
#define all(a) a.begin(), a.end()
using namespace std;

const int mn = 1e6 + 5;

int n, m, a[mn], rev[mn], pre[mn], ans[mn];

int bit[mn];

void add(int u, int val){
    while(u){
        bit[u] = max(bit[u], val);
        u -= (u & -u);
    }
}

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

vector <tuple<int, int, int>> Megumi[mn];

void solve(){
    cin >> n >> m;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        pre[i] = i - 1;
        while(pre[i] > 0 && a[i] >= a[pre[i]]) pre[i] = pre[pre[i]];
    }
    for(int i = 1; i <= m; i++){
        int l, r, k; cin >> l >> r >> k;
        Megumi[r].push_back({l, i, k});
    }
    for(int i = 1; i <= n; i++){
        if(pre[i] > 0) add(pre[i], a[pre[i]] + a[i]);
        for(auto [l, id, k] : Megumi[i]){
            int val = get(l);
            ans[id] = (val <= k ? 1 : 0); 
        }
    }
    for(int i = 1; i <= m; i++) cout << ans[i] << '\n';
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    if(fopen("HILO1.INP", "r")){
        freopen("HILO1.INP", "r", stdin);
        freopen("HILO1.OUT", "w", stdout);
    }

    int t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         freopen("HILO1.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |         freopen("HILO1.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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