oj.uz

Submission #503171

# Submission time Handle Problem Language Result Execution time Memory
503171 2022-01-07T12:19:11 Z lukameladze Divide and conquer (IZhO14_divide) C++14
100 / 100
 78 ms 9200 KB 
# include <bits/stdc++.h>
#define f first
#define s second
#define int long long
#define pb push_back
using namespace std;
const int N = 3e5 + 5;
int  n,x[N],g[N],d[N],pr[N],pr1[N];
int tree[4*N],val,dist,ans,idx;
void build(int node,int le, int ri) {
    if (le == ri) {
        tree[node] = pr[le];
        return ;
    }
    int mid = (le + ri) / 2;
    build(2*node,le,mid);
    build(2 * node + 1, mid + 1, ri);
    tree[node] = max(tree[2*node], tree[2*node + 1]);
}
int getans(int node, int le, int ri, int start,int end, int val) {
    if (le > end || ri < start) return 0;
    int mid = (le + ri) / 2;
    if (le >= start && ri <= end) {
        if (tree[node] < val) return 0;
        if (le == ri) {
            return le; 
        }
        if (tree[2*node + 1] >= val) return getans(2*node + 1, mid + 1, ri, start,end,val);
        else return getans(2*node, le,mid, start,end,val);
    }
    return max(getans(2*node,le,mid,start,end,val), getans(2*node + 1,mid + 1, ri, start,end,val));
}
main() {
    std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>n;
    for (int i = 1; i <= n; i++) {
        cin>>x[i]>>g[i]>>d[i];
        if (i > 1) {
            dist = (x[i] - x[i - 1]);
            pr[i] = pr[i - 1] + d[i] - dist;
          //  update(1,1,n,i, pr[i]);
        }
        ans = max(ans,g[i]);
        pr1[i] = pr1[i - 1] + g[i];
    }
    build(1,1,n);
    for (int i = 1; i <= n; i++) {
        // pr[j] - pr[i] + d[i] >= 0    pr[j] >= pr[i] - d[i]
        val = pr[i] - d[i];
        // i + 1-----> n     >=  val
        idx = getans(1,1,n,i + 1, n, val);
        if (idx == 0) {
            continue; 
        }
        ans = max(ans, pr1[idx] - pr1[i - 1]);
    }cout<<ans<<endl;
}

Compilation message

divide.cpp:33:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   33 | main() {
      | ^~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 336 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 1 ms 328 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 336 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 1 ms 328 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 448 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 460 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 2 ms 736 KB Output is correct
24 Correct 5 ms 716 KB Output is correct

Subtask #3
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 336 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 1 ms 328 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 448 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 460 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 2 ms 736 KB Output is correct
24 Correct 5 ms 716 KB Output is correct
25 Correct 3 ms 716 KB Output is correct
26 Correct 5 ms 1124 KB Output is correct
27 Correct 9 ms 1100 KB Output is correct
28 Correct 28 ms 4300 KB Output is correct
29 Correct 29 ms 4552 KB Output is correct
30 Correct 71 ms 9200 KB Output is correct
31 Correct 57 ms 7996 KB Output is correct
32 Correct 62 ms 8036 KB Output is correct
33 Correct 78 ms 7932 KB Output is correct
34 Correct 42 ms 7936 KB Output is correct
35 Correct 48 ms 8444 KB Output is correct
36 Correct 47 ms 8572 KB Output is correct