Submission #1276301

#TimeUsernameProblemLanguageResultExecution timeMemory
1276301SmuggingSpunSjeckanje (COCI21_sjeckanje)C++20
0 / 110
0 ms332 KiB
#include<bits/stdc++.h> #define taskname "E" using namespace std; typedef long long ll; const int lim = 2e5 + 5; const ll INF = 1e18; struct Data{ ll pos, neg, bal; Data(){} Data(ll pos, ll neg, ll bal){ this->pos = pos; this->neg = neg; this->bal = bal; } }; Data st[lim << 2]; int n, q, a[lim]; ll laz[lim << 2]; Data merge(Data a, Data b){ Data ans; ans.pos = max({a.pos, b.pos, a.bal + b.pos, a.pos + b.bal}); ans.neg = max({a.neg, b.neg, a.bal + b.neg, a.neg + b.bal}); ans.bal = max({a.bal, b.bal, a.bal + b.bal, a.pos + b.neg, a.neg + b.pos}); return ans; } void build(int id, int l, int r){ laz[id] = 0; if(l == r){ st[id] = Data(a[l], -a[l], 0LL); return; } int m = (l + r) >> 1; build(id << 1, l, m); build(id << 1 | 1, m + 1, r); st[id] = merge(st[id << 1], st[id << 1 | 1]); } void push_down(int id){ st[id << 1].pos += laz[id]; st[id << 1].neg -= laz[id]; laz[id << 1] += laz[id]; st[id << 1 | 1].pos += laz[id]; st[id << 1 | 1].neg -= laz[id]; laz[id << 1 | 1] += laz[id]; laz[id] = 0; } void update(int id, int l, int r, int u, int v, int x){ if(l > v || r < u){ return; } if(u <= l && v >= r){ st[id].pos += x; st[id].neg -= x; laz[id] += x; return; } int m = (l + r) >> 1; push_down(id); update(id << 1, l, m, u, v, x); update(id << 1 | 1, m + 1, r, u, v, x); st[id] = merge(st[id << 1], st[id << 1 | 1]); } int main(){ ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); if(fopen(taskname".inp", "r")){ freopen(taskname".inp", "r", stdin); } cin >> n >> q; for(int i = 1; i <= n; i++){ cin >> a[i]; } build(1, 1, n); for(int _ = 0; _ < q; _++){ int l, r, x; cin >> l >> r >> x; update(1, 1, n, l, r, x); cout << st[1].bal << "\n"; } }

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:65:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
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