Submission #948328

#	Time	Username	Problem	Language	Result	Execution time	Memory
948328		steveonalex	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	122 ms	14932 KiB

foehn_phenomena

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }
 
struct FenwickTree{
    ll n;
    vector<ll> a;

    FenwickTree(ll _n){
        n = _n;
        a.resize(n+1);
    }

    void update(ll i, ll v){
        while(i <= n){
            a[i] += v;
            i += LASTBIT(i);
        }
    }

    ll get(ll i){
        ll ans = 0;
        while(i > 0){
            ans += a[i];
            i -= LASTBIT(i);
        }
        return ans;
    }
};

const ll N = 2e5 + 69;

ll n, q;
ll s, t;
ll dt[N];
FenwickTree bit(N);
ll ans= 0;

void update(ll l, ll r, ll val){
    ans -= dt[l];
    ans -= dt[r+1];
    bit.update(l, val);
    bit.update(r + 1, -val);
    dt[l] = bit.get(l) - bit.get(l-1);
    if (dt[l] > 0) dt[l] *= s;
    else dt[l] *= t;

    dt[r+1] = bit.get(r+1) - bit.get(r);
    if (dt[r+1] > 0) dt[r+1] *= s;
    else dt[r+1] *= t;

    ans += dt[l]; ans += dt[r+1];
}
 
int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> q >> s >> t;
    vector<ll> a(n+1);
    for(ll i= 0; i<=n; ++i) cin >> a[i];

    for(ll i = 1; i<=n; ++i){
        update(i, i, a[i]);
    }
    while(q--){
        ll l, r, x; cin >> l >> r >> x;
        update(l, r, x);
        cout << -(ans - dt[n+1]) << "\n";
    }

    return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60