oj.uz

Submission #439023

# Submission time Handle Problem Language Result Execution time Memory
439023 2021-06-29T05:38:25 Z 2548631 Sjeckanje (COCI21_sjeckanje) C++17
110 / 110
 886 ms 49220 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef complex<ld> cp;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pii> vii;
typedef vector<cp> vcp;
typedef vector<ld> vld;
typedef vector<vi> vvi;
typedef vector<vll> vvll;
typedef vector<vii> vvii;

#define fastIO ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL)
#define forw(i,l,r) for( int i = (l) ; i < (r) ; i++ )
#define forb(i,r,l) for( int i = (r) ; i >= (l) ; i-- )
#define log2i(x) (64 - __builtin_clzll(1ll*(x)) - 1)
#define numBit(x) (__builtin_popcountll(1ll*(x)))
#define getBit(x,i) ((x)>>(i)&1)
#define Pi acos(-1.0l)
#define sz(x) int(x.size())
#define mt make_tuple
#define mp make_pair
#define fi first
#define se second
#define pb push_back
#define pf push_front
#define pob pop_back
#define pof pop_front
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define debug(x) cerr << #x << " = " << x << '\n';

const int N = 2e5+7;
const ll inf = 3e18l+7;
int n,q;
ll a[N];

struct Node {
    ll val[4],lhs,rhs;
    Node():lhs(0),rhs(0) {
        forw(i,0,4) val[i]=0;
    }
    Node(ll x):lhs(x),rhs(x) {
        forw(i,0,4) val[i]=0;
        val[3]=abs(x);
    }
    ll operator [](int x) const {return val[x];}
    ll& operator [](int x) {return val[x];}
};

Node merge(const Node &x, const Node &y) {
    Node res;
    res.lhs=x.lhs;
    res.rhs=y.rhs;
    forw(i,0,4) forw(j,0,3+(x.rhs*y.lhs>=0)) {
        res[i]=max(res[i],x[i/2*2+j/2]+y[j%2*2+i%2]);
    }
    return res;
}

struct SegTree {
    vector<Node> _a;
    int _n;
    SegTree():_a(0),_n(0) {}
    ll operator [](int x) const {return _a[1].val[x];}
    ll& operator [](int x) {return _a[1].val[x];}
    void init(int len) {
        _a.assign(4*(_n=len)+4,Node());
        build(1,0,_n-1);
    }
    void build(int idx, int l, int r) {
        if(l==r) _a[idx]=Node(a[l]);
        else {
            int mid=(l+r)>>1, k=idx<<1;
            build(k,l,mid);
            build(k+1,mid+1,r);
            _a[idx]=merge(_a[k],_a[k+1]);
        }
    }
    void upd(int x, ll v, int idx, int l, int r) {
        if(x<l||r<x||l>r) return;
        if(l==r) _a[idx]=Node(_a[idx].rhs+v);
        else {
            int mid=(l+r)>>1, k=idx<<1;
            upd(x,v,k,l,mid);
            upd(x,v,k+1,mid+1,r);
            _a[idx]=merge(_a[k],_a[k+1]);
        }
    }
    void upd(int x, ll v) {upd(x,v,1,0,_n-1);}
}T;

int main() {
    fastIO;
#ifndef ONLINE_JUDGE
    //freopen("test.inp","r",stdin);
    //freopen("test.out","w",stdout);
#endif // ONLINE_JUDGE

    cin >> n >> q;
    forw(i,0,n) cin >> a[i];
    forw(i,0,n-1) a[i]=a[i+1]-a[i];
    T.init(n-1);
    while(q--) {
        int l,r,x; cin >> l >> r >> x;
        l--, r--;
        T.upd(l-1,x); T.upd(r,-x);
        ll ans=-inf;
        forw(i,0,4) ans=max(ans,T[i]);
        cout << ans << '\n';
    }
    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 7 ms 972 KB Output is correct
8 Correct 6 ms 972 KB Output is correct
9 Correct 7 ms 972 KB Output is correct
10 Correct 7 ms 972 KB Output is correct
11 Correct 7 ms 972 KB Output is correct
12 Correct 7 ms 1100 KB Output is correct

Subtask #3
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 7 ms 972 KB Output is correct
8 Correct 6 ms 972 KB Output is correct
9 Correct 7 ms 972 KB Output is correct
10 Correct 7 ms 972 KB Output is correct
11 Correct 7 ms 972 KB Output is correct
12 Correct 7 ms 1100 KB Output is correct
13 Correct 886 ms 48560 KB Output is correct
14 Correct 798 ms 48580 KB Output is correct
15 Correct 837 ms 48524 KB Output is correct
16 Correct 858 ms 48436 KB Output is correct
17 Correct 817 ms 48364 KB Output is correct
18 Correct 761 ms 49220 KB Output is correct