oj.uz

Submission #637354

# Submission time Handle Problem Language Result Execution time Memory
637354 2022-09-01T13:17:00 Z IWTIM Sjeckanje (COCI21_sjeckanje) C++17
110 / 110
 618 ms 29520 KB 
# include <bits/stdc++.h>
using namespace std;
using ll = long long;
using db = long double; // or double, if TL is tight
using str = string; // yay python! 
 
// pairs
using pii = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
#define mp make_pair
#define f first
#define s second
 
#define tcT template<class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
tcT> using V = vector<T>; 
tcT, size_t SZ> using AR = array<T,SZ>; 
using vi = V<int>;
using vb = V<bool>;
using vl = V<ll>;
using vd = V<db>;
using vs = V<str>;
using vpi = V<pii>;
using vpl = V<pl>;
using vpd = V<pd>;
 
// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sor(x) sort(all(x)) 
#define rsz resize
#define ins insert 
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
 
#define lb lower_bound
#define ub upper_bound
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define rep(a) F0R(_,a)
#define each(a,x) for (auto& a: x)
const int MOD = 998244353;
const int MX = 2e5+5;
const ll BIG = 1e18; // not too close to LLONG_MAX
const db PI = acos((db)-1);
const int dx[4]{1,0,-1,0}, dy[4]{0,1,0,-1}; // for every grid problem!!
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); 
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
struct DSU {
	vi e; void init(int N) { e = vi(N,-1); }
	int get(int x) { return e[x] < 0 ? x : e[x] = get(e[x]); } 
	bool sameSet(int a, int b) { return get(a) == get(b); }
	int size(int x) { return -e[get(x)]; }
	bool unite(int x, int y) { // union by size
		x = get(x), y = get(y); if (x == y) return 0;
		if (e[x] > e[y]) swap(x,y);
		e[x] += e[y]; e[y] = x; return 1;
	}
};
/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void> struct is_iterable : false_type {};
	tcT> struct is_iterable<T, void_t<decltype(begin(declval<T>())),
	                                  decltype(end(declval<T>()))
	                                 >
	                       > : true_type {};
	tcT> constexpr bool is_iterable_v = is_iterable<T>::value;
 
	//////////// is_readable
	tcT, class = void> struct is_readable : false_type {};
	tcT> struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_readable_v = is_readable<T>::value;
 
	//////////// is_printable
	// // https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void> struct is_printable : false_type {};
	tcT> struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cout << declval<T>()), ostream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_printable_v = is_printable<T>::value;
}*/
using ll = long long;
using db = long double; // or double, if TL is tight
using str = string; // yay python! 
 
// pairs
using pii = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
#define mp make_pair
#define f first
#define s second
 
#define tcT template<class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
tcT> using V = vector<T>; 
tcT, size_t SZ> using AR = array<T,SZ>; 
using vi = V<int>;
using vb = V<bool>;
using vl = V<ll>;
using vd = V<db>;
using vs = V<str>;
using vpi = V<pii>;
using vpl = V<pl>;
using vpd = V<pd>;
 
// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend() 
#define sor(x) sort(all(x)) 
#define rsz resize
#define ins insert 
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
 
#define lb lower_bound
#define ub upper_bound
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define rep(a) F0R(_,a)
#define each(a,x) for (auto& a: x)
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
 
/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void> struct is_iterable : false_type {};
	tcT> struct is_iterable<T, void_t<decltype(begin(declval<T>())),
	                                  decltype(end(declval<T>()))
	                                 >
	                       > : true_type {};
	tcT> constexpr bool is_iterable_v = is_iterable<T>::value;
 
	//////////// is_readable
	tcT, class = void> struct is_readable : false_type {};
	tcT> struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_readable_v = is_readable<T>::value;
 
	//////////// is_printable
	// // https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void> struct is_printable : false_type {};
	tcT> struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v<decltype(cout << declval<T>()), ostream&>
	        >
	    > : true_type {};
	tcT> constexpr bool is_printable_v = is_printable<T>::value;
}*/
#define int long long
const int N = 3e5 + 5, inf = 1e15;
int t,n,q,a[N],d[N];
int tree[4 * N][2][2];
void merge(int node, int le, int ri, int mid) {
    for (int i = 0; i < 2; i++) {
        for (int j = 0; j < 2; j++) { 
            tree[node][i][j] = 0;
            for (int k = 0; k < 2; k++) {
                for (int x = 0; x < 2; x++) {
                    if (k && x) {
                        if (max(d[mid], d[mid + 1]) > 0 && min(d[mid],d[mid + 1]) < 0) continue;
                    }
                    tree[node][i][j] = max(tree[node][i][j], tree[le][i][k] + tree[ri][x][j]);
                }
            }
        }
    }
}
void build(int node, int le, int ri) {
    if (le == ri) {
        tree[node][1][1] = abs(d[le]);
        tree[node][1][0] = -inf; tree[node][0][1] = -inf;
        return ;
    }
    int mid = (le + ri) / 2;
    build(2 * node,le,mid);
    build(2 * node + 1, mid + 1, ri);
    merge(node, 2 * node, 2 * node + 1, mid);
}
void update(int node, int le, int ri, int idx, int val) {
    if (le > idx || ri < idx) return ;
    if (le == ri) {
        tree[node][1][1] = abs(d[le]);
        return ;
    }
    int mid = (le + ri) / 2;
    update(2 * node,le,mid,idx,val);
    update(2 * node + 1, mid + 1, ri, idx,val);
    merge(node, 2 * node, 2 * node + 1, mid);
}
main() {
    std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>n>>q;
    for (int i = 1; i <= n; i++) {
    	cin>>a[i];
	}
	for (int i = 1; i < n; i++) {
	    d[i] = (a[i + 1] - a[i]);
	}
	build(1,1,n - 1);
	for (int i = 1; i <= q; i++) {
		int x,l,r;
		cin>>l>>r>>x;
		d[l - 1] += x;
		d[r] -= x;
		update(1,1,n - 1,l - 1,x);
		update(1,1,n - 1,r, -x);
		int ans = 0;
		for (int i = 0; i < 2; i++) {
		    for (int j = 0; j < 2; j++) ans = max(ans, tree[1][i][j]);
		}
		cout<<ans<<"\n";
	}
}

Compilation message

Main.cpp:222:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  222 | main() {
      | ^~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 6 ms 724 KB Output is correct
8 Correct 6 ms 724 KB Output is correct
9 Correct 5 ms 724 KB Output is correct
10 Correct 5 ms 724 KB Output is correct
11 Correct 5 ms 724 KB Output is correct
12 Correct 5 ms 688 KB Output is correct

Subtask #3
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 6 ms 724 KB Output is correct
8 Correct 6 ms 724 KB Output is correct
9 Correct 5 ms 724 KB Output is correct
10 Correct 5 ms 724 KB Output is correct
11 Correct 5 ms 724 KB Output is correct
12 Correct 5 ms 688 KB Output is correct
13 Correct 618 ms 28956 KB Output is correct
14 Correct 576 ms 29028 KB Output is correct
15 Correct 602 ms 29024 KB Output is correct
16 Correct 575 ms 28912 KB Output is correct
17 Correct 562 ms 28768 KB Output is correct
18 Correct 518 ms 29520 KB Output is correct