Submission #367810

#	Time	Username	Problem	Language	Result	Execution time	Memory
367810		vaaven	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	194 ms	13164 KiB

foehn_phenomena

#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#include <iostream>
#include <vector>
#include <algorithm>
#include <math.h>
#include <set>
#include <stack>
#include <iomanip>
#include <bitset>
#include <map>
#include <cassert>
#include <array>
#include <queue>
#include <cstring>
#include <random>
#include <unordered_set>
#include <unordered_map>
#define pqueue priority_queue
#define pb(x) push_back(x)
 #define endl '\n'
#define all(x) x.begin(), x.end()
#define int long  long
    
using namespace std;
    
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
// typedef tuple<ll, ll, ll> tiii;
typedef pair<int, int> pii;
typedef vector<pair<int, int> > vpii;
typedef vector<bool> vb;
typedef vector<string> vs;
typedef vector<char> vc;
    
const int inf = 1e9 + 228;
const int infll = 1e18;
const ll mod = 1e9 + 7;
const ll mod2 = 998244353;
const ld eps = 1e-14;
    
    
void fast_io(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
//    freopen("inputik.txt", "r", stdin);
//    freopen("outputik.txt", "w", stdout);
}
 
 
const int maxn = 2e5 + 228;
int t[maxn], a[maxn], n, q;
 
void add(int i, int x){
    for(; i<maxn; i+=i&-i)
        t[i] += x;
}
 
int get(int i){
    int res = 0;
    for(; i>0; i-=i&-i)
        res += t[i];
    return res;
}
 
 
int get(int a, int b, int s, int t){
    if(a < b)
        return - s * (b-a);
    else
        return t * (a-b);
}
   
void solve(){
    int s, t;
    cin >> n >> q >> s >> t;
    for(int i=0; i<=n; i++){
        cin >> a[i];
    }
    int ans = 0;
    for(int i=1; i<=n; i++){
        ans += get(a[i-1], a[i], s, t);
    }
    for(int i=1; i<=q; i++){
        int l, r, x;
        cin >> l >> r >> x;
        ans -= get(a[l-1] + get(l-1), a[l] + get(l), s, t);
        if(r != n)
            ans -= get(a[r] + get(r), a[r+1] + get(r+1), s, t);
        add(l, x);
        add(r+1, -x);
        ans += get(a[l-1] + get(l-1), a[l] + get(l), s, t);
        if(r != n)
            ans += get(a[r] + get(r), a[r+1] + get(r+1), s, t);
        cout << ans << endl;
    }
       
}
   
signed main(){
     fast_io();
//  ;(time(NULL));
    cout << fixed << setprecision(10);
    int q = 1;
//    cin >> q;
    while(q--)
        solve();
}

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