Submission #1202849

#TimeUsernameProblemLanguageResultExecution timeMemory
1202849hoa208Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)C++20
0 / 100
1128 ms116320 KiB
#include<bits/stdc++.h> using namespace std; #define ll long long #define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++) #define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; i--) #define pa pair<ll, ll> #define fi first #define se second #define bit(mask, j) ((mask >> j) & 1) #define t_test int t;cin >> t;while(t--) const ll mod = 1e9 + 7; const ll INF = 1e18; inline void adm(ll &x){if(x>=mod)x%=mod;else if(x<0)x+=mod;} //-------------------------------------------------------------------- const ll N = 1e6 + 10; ll n, a[N], nxt[N], q; ll t[4 * N], st[4 * N], lazy[4 * N]; void build(ll id = 1, ll l = 1, ll r = n) { if(l == r) { t[id] = a[l]; return; } ll mid = l + r >> 1; build(id << 1, l, mid); build(id << 1 | 1, mid + 1, r); t[id] = max(t[id << 1], t[id << 1 | 1]); } void down(ll id) { if(lazy[id] == 0) return; st[id << 1] = max(lazy[id], st[id << 1]); st[id << 1 | 1] = max(lazy[id], st[id << 1 | 1]); lazy[id << 1] = max(lazy[id], lazy[id << 1]); lazy[id << 1 | 1] = max(lazy[id], lazy[id << 1 | 1]); lazy[id] = 0; } void update(ll u, ll v, ll val, ll id = 1, ll l = 1, ll r = n) { if(u > r || v < l) return; if(u <= l && v >= r) { st[id] = max(st[id], val); lazy[id] = max(lazy[id], val); return; } ll mid = l + r >> 1; down(id); update(u, v, val, id << 1, l, mid); update(u, v, val, id << 1 | 1, mid + 1, r); st[id] = max(st[id << 1], st[id << 1 | 1]); } ll get(ll u, ll v, ll id = 1, ll l = 1, ll r = n) { if(u > r || v < l) return 0; if(u <= l && v >= r) { return st[id] + t[id]; } ll mid = l + r >> 1; down(id); return max(get(u, v, id << 1, l, mid), get(u, v, id << 1 | 1, mid + 1, r)); } struct state { ll r, k, id; }; vector<state> qr[N]; bool ans[N]; void hbmt() { cin >> n >> q; FOR(i, 1, n) cin >> a[i]; build(); stack<ll> st; st.push(n + 1); a[n + 1] = INF; FOR(i, 1, q) { ll l, r, k; cin >> l >> r >> k; qr[l].push_back({r, k, i}); } FORD(i, n, 1) { while(!st.empty() && a[st.top()] < a[i]) st.pop(); update(i + 1, st.top() - 1, a[i]); st.push(i); for(auto e : qr[i]) { ans[e.id] = (get(i + 1, e.r) <= e.k); } } FOR(i, 1, q) cout << ans[i] << '\n'; } int main() { ios_base::sync_with_stdio(0); cin.tie(0);cout.tie(0); if(fopen("hbmt.inp", "r")) { freopen("hbmt.inp", "r", stdin); freopen("hbmt.ans", "w", stdout); } // t_test hbmt(); return 0; }

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen("hbmt.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen("hbmt.ans", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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