Submission #988072

#	Time	Username	Problem	Language	Result	Execution time	Memory
988072		long	Trading (IZhO13_trading)	C++17	100 / 100	397 ms	47228 KiB

trading

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
const int N = 3e5 + 10;
 
int seg[N * 4], laz[N * 4];
 
void push(int id) {
    int &t = laz[id];
    laz[id * 2] += t;
    laz[id * 2 + 1] += t;
    seg[id * 2] += t;
    seg[id * 2 + 1] += t;
    t = 0;
}
 
void upd(int id, int l, int r, int u, int v, int c) {
    if (l > v || r < u)
        return;
 
    if (l >= u && r <= v) {
        laz[id] += c;
        seg[id] += c;
        return;
    }
 
    push(id);
    int m = (l + r) / 2;
    upd(id * 2, l, m, u, v, c);
    upd(id * 2 + 1, m + 1, r, u, v, c);
    seg[id] = max(seg[id * 2], seg[id * 2 + 1]);
}
 
void run(int id, int l, int r, int p, int v) {
    if (l > p || r < p)
        return;
 
    if (l == r) {
        seg[id] = v;
        laz[id] = 0;
        return;
    } 
 
    push(id);
    int m = (l + r) / 2;
    run(id * 2, l, m, p, v);
    run(id * 2 + 1, m + 1, r, p, v);
    seg[id] = max(seg[id * 2], seg[id * 2 + 1]);
}
 
vector <int> event[N];
int l[N], r[N], v[N];
 
main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    seg[1] = laz[1] = -1e8;
    int n, m;
    cin >> n >> m;
 
    for (int i = 1; i <= m; i++) {
        cin >> l[i] >> r[i] >> v[i];
        event[l[i]].pb(i);
        event[r[i] + 1].pb(-i);
    }
 
    for (int i = 1; i <= n; i++) {
        upd(1, 1, m, 1, m, 1);
        for (auto x : event[i]) {
            if (x > 0) {
                run(1, 1, m, x, v[x]);
            } else {
                run(1, 1, m, -x, -1e8);
            }
        }
 
        cout << max(0LL, seg[1]) << " ";
    }
 
    return 0;
} 

Compilation message (stderr)

trading.cpp:55:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   55 | main() {
      | ^~~~

• Subtask 1: 100 / 100