Submission #484943

#	Time	Username	Problem	Language	Result	Execution time	Memory
484943		dxz05	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	436 ms	12384 KiB

foehn_phenomena

#pragma GCC optimize("Ofast,O2,O3,unroll-loops")
#pragma GCC target("avx2")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())
#define all(x) (x).begin(), (x).end()
#define lla(x) (x).rbegin(), (x).rend()

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

#define MP make_pair

typedef long long ll;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const double eps = 0.000001;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 1e6 + 3e2;
const int M = 2222;

int a[N];
ll f[N];

void add(int x, int y){
    while (x < N){
        f[x] += y;
        x += (-x & x);
    }
}

ll get(int x){
    ll res = 0;
    while (x > 0){
        res += f[x];
        x -= (-x & x);
    }
    return res;
}

int S, T;
ll cost(int i){
    ll x = a[i] + get(i), y = a[i + 1] + get(i + 1);
    return 1ll * (x - y) * (x < y ? S : T);
}

void solve(int TC) {
    int n, q;
    cin >> n >> q >> S >> T;

    for (int i = 0; i <= n; i++){
        cin >> a[i];
    }

    ll ans = 0;
    for (int i = 0; i < n; i++){
        ans += cost(i);
    }

    while (q--){
        int l, r, x;
        cin >> l >> r >> x;

        ans -= cost( l - 1);
        if (r < n) ans -= cost(r);

        add(l, x);
        add(r + 1, -x);

        ans += cost(l - 1);
        if (r < n) ans += cost(r);

        cout << ans << endl;
    }

}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);

#ifdef dddxxz
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int TC = 1;
//    cin >> TC;

    for (int test = 1; test <= TC; test++) {
        debug(test);
        //cout << "Case #" << test << ": ";
        solve(test);
    }

    cerr << endl << "Time: " << int(getCurrentTime() * 1000) << " ms" << endl;

    return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp: In function 'int main()':
foehn_phenomena.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
foehn_phenomena.cpp:112:9: note: in expansion of macro 'debug'
  112 |         debug(test);
      |         ^~~~~

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