Submission #689800

#	Time	Username	Problem	Language	Result	Execution time	Memory
689800		nguyentunglam	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	833 ms	94116 KiB

sortbooks

#include<bits/stdc++.h>
#define fi first
#define se second
#define endl "\n"
#define ii pair<int, int>
using namespace std;
const int N = 1e6 + 10;
int a[N], k[N], bit[N], ans[N];
int n, m;
vector<pair<int, int> > query[N];
void up(int pos, int val) {
    while (pos) {
        bit[pos] = max(bit[pos], val);
        pos -= pos & -pos;
    }
}
int get(int pos) {
    int ret = 0;
    while (pos <= n) {
        ret = max(ret, bit[pos]);
        pos += pos & -pos;
    }
    return ret;
}
int main() {
    #define task ""
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen ("task.inp", "r")) {
        freopen ("task.inp", "r", stdin);
        freopen ("task.out", "w", stdout);
    }
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    cin >> n >> m;
    for(int i = 1; i <= n; i++) cin >> a[i];
    for(int i = 1; i <= m; i++) {
        int l, r; cin >> l >> r >> k[i];
        query[r].push_back({l, i});
    }
    stack<int> st;
    for(int i = 1; i <= n; i++) {
        while (!st.empty() && a[st.top()] <= a[i]) st.pop();
        if (!st.empty()) up(st.top(), a[st.top()] + a[i]);
        st.push(i);
        for(auto [l, id] : query[i]) ans[id] = get(l);
    }
    for(int i = 1; i <= m; i++) cout << (ans[i] <= k[i]) << endl;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:29:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen ("task.inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:30:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen ("task.out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:33:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:34:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |         freopen (task".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