Submission #1023244

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023244		phong	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	469 ms	19796 KiB

foehn_phenomena

#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>

#define ll long long
#define int long long
const int nmax = 2e5 + 5;
const int lg = 18;
const int base = 311;
const int M = 5e6;
const ll oo = 1e9;
const int mod = 987654321;
#define fi first
#define se second
#define endl "\n"
#define pii pair<ll, int>

using namespace std;

int n, q, S, T, a[nmax];
int tree[nmax << 2], lz[nmax << 2];

void build(int id, int l, int r){
    if(l == r){
        tree[id] = a[l];
        return;
    }
    int mid = r + l >> 1;
    build(id << 1, l, mid);
    build(id << 1 | 1, mid + 1, r);
}
void fix(int id, int val){
    lz[id] += val;
    tree[id] += val;
}
void down(int id){
    fix(id << 1, lz[id]);
    fix(id << 1 | 1, lz[id]);
    lz[id] = 0;
}
void update(int id, int l, int r, int u, int v, int x){
    if(l > v || r < u) return;
    if(l >= u && r <= v){
        return fix(id, x);
    }
    down(id);
    int mid = r + l >> 1;
    update(id << 1, l, mid, u, v, x);
    update(id << 1 | 1, mid + 1, r, u, v, x);
}
#define update(l, r, x) update(1, 0, n, l, r, x)

int get(int id, int l, int r, int u){
    if(l == r) return tree[id];
    down(id);
    int mid = r + l >> 1;
    if(u <= mid) return get(id << 1, l, mid, u);
    return get(id << 1 | 1, mid + 1, r, u);
}
#define get(u) get(1, 0, n, u)
main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL), cout.tie(NULL);
//    freopen("code.inp", "r", stdin);
//    freopen("code.out", "w", stdout);
    cin >> n >> q >> S >> T;
    for(int i = 0; i <= n; ++i) cin >> a[i];
    build(1, 0, n);
    int c1 = 0, c2 = 0;
    for(int i = 0; i < n; ++i){
        if(a[i] < a[i + 1]) c1 += abs(a[i + 1] - a[i]);
        else c2 += abs(a[i + 1] - a[i]);
    }
//    cout << c1 << ' ' << c2 << endl;
    while(q--){
        int l, r, x;
        cin >> l >> r >> x;

        if(get(l - 1) < get(l)) c1 -= abs(get(l - 1) - get(l));
        else c2 -= abs(get(l - 1) - get(l));
        if(r < n){
            if(get(r) < get(r + 1)) c1 -= abs(get(r) - get(r + 1));
            else c2 -= abs(get(r) - get(r + 1));
        }
        update(l, r, x);
        if(get(l - 1) < get(l)) c1 += abs(get(l - 1) - get(l));
        else c2 += abs(get(l - 1) - get(l));
        if(r < n){
            if(get(r) < get(r + 1)) c1 += abs(get(r) - get(r + 1));
            else c2 += abs(get(r) - get(r + 1));
        }
//        for(int i = 0; i <= n; ++i) cout << get(i) << ' ';
//        cout << endl;
        cout << -S *c1 + T * c2 << endl;

    }

}
/*
4
-7 5
6 -1
-10 10
-3 6
*/

Compilation message (stderr)

foehn_phenomena.cpp: In function 'void build(long long int, long long int, long long int)':
foehn_phenomena.cpp:29:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |     int mid = r + l >> 1;
      |               ~~^~~
foehn_phenomena.cpp: In function 'void update(long long int, long long int, long long int, long long int, long long int, long long int)':
foehn_phenomena.cpp:48:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   48 |     int mid = r + l >> 1;
      |               ~~^~~
foehn_phenomena.cpp: In function 'long long int get(long long int, long long int, long long int, long long int)':
foehn_phenomena.cpp:57:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   57 |     int mid = r + l >> 1;
      |               ~~^~~
foehn_phenomena.cpp: At global scope:
foehn_phenomena.cpp:62:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   62 | main(){
      | ^~~~

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