oj.uz

Submission #381315

# Submission time Handle Problem Language Result Execution time Memory
381315 2021-03-25T03:56:08 Z knightron0 Divide and conquer (IZhO14_divide) C++14
100 / 100
 86 ms 9996 KB 
#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define fr first
#define sc second
#define clr(a, x) memset(a, x, sizeof(a))
#define dbg(x) cout<<"("<<#x<<"): "<<x<<endl;
#define printvector(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout<<*it<<" "; cout<<endl;
#define all(v) v.begin(), v.end()
#define lcm(a, b) (a * b)/__gcd(a, b)
#define int long long int
#define printvecpairs(vec) for(auto it: vec) cout<<it.fr<<' '<<it.sc<<endl;
#define endl '\n'
#define float long double

const int MOD = 1e9 + 7;
const int INF = 2e15;
const int MAXN = 1e6 + 5;

int a[MAXN], b[MAXN];
vector<int> conv;
int tree[2*MAXN];

int query(int node, int start, int end, int l, int r){
    if(r < start or end < l){
        return 0;
    }
    if(l <= start and end <= r){
        return tree[node];
    }
    int mid = (start+end)/2;
    int p1 = query(2*node, start, mid, l, r);
    int p2 = query(2*node +1, mid+1, end, l, r);
    return max(p1,p2);
}

void build(int curr, int start, int end){
    if(start == end) {
        tree[curr] = b[start];
    } else {
        int mid = (start+end)/2;
        build(2*curr, start, mid);
        build(2*curr+1, mid+1, end);
        tree[curr] = max(tree[2*curr],tree[2*curr+1]);
    }
}


void update(int node, int start, int end, int idx, int val){
    if(start == end){
        b[idx] += val;
        tree[node] += val;
    } else {
        int mid = (start + end)/2;
        if(start <= idx and idx <= mid){
            update(2*node, start, mid, idx, val);
        } else {
            update(2*node+1, mid+1, end, idx, val);
        }
        tree[node] = max(tree[2*node],tree[2*node+1]);
    }
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    #endif
    int n; cin>>n;
    for(int i= 0;i<=n+3;i++){
        b[i] = 0;
    }
    vector<pair<int, pair<int, int>>> vec;
    for(int i= 0;i<n;i++){
    	int t1, t2, t3;
    	cin>>t1>>t2>>t3;
    	vec.pb({t1, {t2, t3}});
    }
    int prefsm[n+2], pref[n+2];
    pref[0] = prefsm[0] = 0;
    for(int i = 1;i<=n;i++){
    	pref[i] = pref[i-1] + vec[i-1].sc.sc;
        prefsm[i] = prefsm[i-1] + vec[i-1].sc.fr;
    }
    for(int i= 1;i<=n;i++){
    	a[i] = vec[i-1].fr-pref[i];
    	conv.pb(a[i]);
    }
    sort(all(conv));
    conv.resize(unique(all(conv)) - conv.begin());
    for(int i=1;i<=n;i++){
        a[i] = lower_bound(all(conv), a[i]) - conv.begin();   
        a[i]++; 
    }
    build(1, 1, n);
    int ans = 0;
    for(int i = n;i>=1;i--){
        if(b[a[i]] == 0){
            update(1, 1, n, a[i], i);
        }
        int vl = vec[i-1].fr-pref[i-1];
        int x= upper_bound(all(conv), vl) - conv.begin();
        int mx = query(1, 1, n, 1, x);
        ans = max(prefsm[mx]-prefsm[i-1], ans);
    }
    cout<<ans<<endl;
    return 0;
}

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 2 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 2 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 2 ms 492 KB Output is correct
18 Correct 2 ms 492 KB Output is correct
19 Correct 2 ms 492 KB Output is correct
20 Correct 2 ms 492 KB Output is correct
21 Correct 2 ms 492 KB Output is correct
22 Correct 3 ms 492 KB Output is correct
23 Correct 4 ms 940 KB Output is correct
24 Correct 4 ms 940 KB Output is correct

Subtask #3
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 2 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 492 KB Output is correct
17 Correct 2 ms 492 KB Output is correct
18 Correct 2 ms 492 KB Output is correct
19 Correct 2 ms 492 KB Output is correct
20 Correct 2 ms 492 KB Output is correct
21 Correct 2 ms 492 KB Output is correct
22 Correct 3 ms 492 KB Output is correct
23 Correct 4 ms 940 KB Output is correct
24 Correct 4 ms 940 KB Output is correct
25 Correct 4 ms 940 KB Output is correct
26 Correct 8 ms 1384 KB Output is correct
27 Correct 8 ms 1384 KB Output is correct
28 Correct 40 ms 5088 KB Output is correct
29 Correct 42 ms 5088 KB Output is correct
30 Correct 86 ms 9692 KB Output is correct
31 Correct 79 ms 9692 KB Output is correct
32 Correct 81 ms 9692 KB Output is correct
33 Correct 80 ms 9996 KB Output is correct
34 Correct 82 ms 9692 KB Output is correct
35 Correct 81 ms 9692 KB Output is correct
36 Correct 84 ms 9696 KB Output is correct