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Submission #284870

# Submission time Handle Problem Language Result Execution time Memory
284870 2020-08-28T07:20:59 Z achibasadzishvili Discharging (NOI20_discharging) C++14
36 / 100
 1000 ms 239704 KB 
#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pb push_back
using namespace std;
ll n,a[1000002],dp[1000002],rm[1000002][21],po[2000002],pw[200];
vector<ll>del[1000002];
set<ll>st;
set<ll>::iterator it;
ll get(ll x,ll y){
    ll lo = po[y - x + 1];
    return max(rm[y][lo] , rm[x + pw[lo] - 1][lo]);
}
ll ind(ll x,ll y){
    if(y == n)return -1;
    ll l = y + 1,r = n,mid,ind = -1;
    while(r >= l){
        mid = (l + r) / 2;
        if(dp[x] + get(x + 1 , mid) * (n - x) >= dp[y] + get(y + 1 , mid) * (n - y)){
            r = mid - 1;
            ind = mid;
        }
        else
            l = mid + 1;
    }
    return ind;
}
void delet(ll x){
    if(st.find(x) == st.end())return;
    if(st.find(x) == st.begin()){
        st.erase(st.begin());
        return;
    }
    if(st.upper_bound(x) == st.end()){
        st.erase(st.find(x));
        return;
    }
    st.erase(st.find(x));
    it = st.upper_bound(x);
    ll y = (*it);
    it--;
    x = (*it);
    ll cur = ind(x , y);
    if(cur == -1)return;
    del[cur].pb(x);
}
int main(){
    ios::sync_with_stdio(false);
    cin >> n;
    
    for(int i=1; i<=n; i++){
        cin >> a[i];
    }
    
    pw[0] = 1;
    
    for(int i=1; i<=21; i++){
        pw[i] = pw[i - 1] * 2;
        for(int j=pw[i - 1]; j<pw[i]; j++){
            if(j <= 1000000)
                po[j] = i - 1;
        }
    }
    
    for(int i=1; i<=n; i++){
        rm[i][0] = a[i];
        for(int j=1; j<=20; j++){
            if(i - pw[j] + 1 >= 1)
                rm[i][j] = max(rm[i][j - 1] , rm[i - pw[j - 1]][j - 1]);
        }
    }
    
    st.insert(0);
    
    for(int i=1; i<=n; i++){
        for(int j=0; j<del[i].size(); j++){
            delet(del[i][j]);
        }
        ll x = (*st.begin());
        dp[i] = dp[x] + get(x + 1 , i) * (n - x);
        it = st.end();
        it--;
        st.insert(i);
        ll cur = ind((*it) , i);
        if(cur != -1)
            del[cur].pb((*it));
    }
    
    cout << dp[n];
    
    
    return 0;
}

Compilation message

Discharging.cpp: In function 'int main()':
Discharging.cpp:77:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |         for(int j=0; j<del[i].size(); j++){
      |                      ~^~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 31616 KB Output is correct
2 Correct 22 ms 31744 KB Output is correct
3 Correct 23 ms 31616 KB Output is correct
4 Correct 23 ms 31744 KB Output is correct
5 Correct 23 ms 31616 KB Output is correct
6 Correct 23 ms 31616 KB Output is correct
7 Correct 22 ms 31616 KB Output is correct
8 Correct 21 ms 31616 KB Output is correct
9 Correct 22 ms 31616 KB Output is correct
10 Correct 22 ms 31616 KB Output is correct
11 Correct 23 ms 31616 KB Output is correct
12 Correct 21 ms 31744 KB Output is correct
13 Correct 29 ms 31744 KB Output is correct
14 Correct 23 ms 31744 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 31992 KB Output is correct
2 Correct 23 ms 32000 KB Output is correct
3 Correct 22 ms 32000 KB Output is correct
4 Correct 24 ms 32000 KB Output is correct
5 Correct 25 ms 32000 KB Output is correct
6 Correct 22 ms 32032 KB Output is correct
7 Correct 24 ms 32000 KB Output is correct
8 Correct 26 ms 32000 KB Output is correct
9 Correct 26 ms 31992 KB Output is correct
10 Correct 24 ms 32000 KB Output is correct
11 Correct 24 ms 32000 KB Output is correct
12 Correct 25 ms 32000 KB Output is correct
13 Correct 25 ms 31988 KB Output is correct
14 Correct 25 ms 32000 KB Output is correct
15 Correct 25 ms 32000 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 31992 KB Output is correct
2 Correct 23 ms 32000 KB Output is correct
3 Correct 22 ms 32000 KB Output is correct
4 Correct 24 ms 32000 KB Output is correct
5 Correct 25 ms 32000 KB Output is correct
6 Correct 22 ms 32032 KB Output is correct
7 Correct 24 ms 32000 KB Output is correct
8 Correct 26 ms 32000 KB Output is correct
9 Correct 26 ms 31992 KB Output is correct
10 Correct 24 ms 32000 KB Output is correct
11 Correct 24 ms 32000 KB Output is correct
12 Correct 25 ms 32000 KB Output is correct
13 Correct 25 ms 31988 KB Output is correct
14 Correct 25 ms 32000 KB Output is correct
15 Correct 25 ms 32000 KB Output is correct
16 Execution timed out 1100 ms 233524 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1093 ms 239704 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 31616 KB Output is correct
2 Correct 22 ms 31744 KB Output is correct
3 Correct 23 ms 31616 KB Output is correct
4 Correct 23 ms 31744 KB Output is correct
5 Correct 23 ms 31616 KB Output is correct
6 Correct 23 ms 31616 KB Output is correct
7 Correct 22 ms 31616 KB Output is correct
8 Correct 21 ms 31616 KB Output is correct
9 Correct 22 ms 31616 KB Output is correct
10 Correct 22 ms 31616 KB Output is correct
11 Correct 23 ms 31616 KB Output is correct
12 Correct 21 ms 31744 KB Output is correct
13 Correct 29 ms 31744 KB Output is correct
14 Correct 23 ms 31744 KB Output is correct
15 Correct 30 ms 31992 KB Output is correct
16 Correct 23 ms 32000 KB Output is correct
17 Correct 22 ms 32000 KB Output is correct
18 Correct 24 ms 32000 KB Output is correct
19 Correct 25 ms 32000 KB Output is correct
20 Correct 22 ms 32032 KB Output is correct
21 Correct 24 ms 32000 KB Output is correct
22 Correct 26 ms 32000 KB Output is correct
23 Correct 26 ms 31992 KB Output is correct
24 Correct 24 ms 32000 KB Output is correct
25 Correct 24 ms 32000 KB Output is correct
26 Correct 25 ms 32000 KB Output is correct
27 Correct 25 ms 31988 KB Output is correct
28 Correct 25 ms 32000 KB Output is correct
29 Correct 25 ms 32000 KB Output is correct
30 Correct 27 ms 32000 KB Output is correct
31 Correct 27 ms 32000 KB Output is correct
32 Correct 24 ms 32000 KB Output is correct
33 Correct 23 ms 32000 KB Output is correct
34 Correct 23 ms 32000 KB Output is correct
35 Correct 26 ms 32000 KB Output is correct
36 Correct 23 ms 32000 KB Output is correct
37 Correct 24 ms 32000 KB Output is correct
38 Correct 25 ms 32060 KB Output is correct
39 Correct 24 ms 31992 KB Output is correct
40 Correct 24 ms 32000 KB Output is correct
41 Correct 25 ms 32000 KB Output is correct
42 Correct 23 ms 32000 KB Output is correct
43 Correct 25 ms 32000 KB Output is correct
44 Correct 26 ms 32000 KB Output is correct
45 Correct 27 ms 31992 KB Output is correct
46 Correct 24 ms 32000 KB Output is correct
47 Correct 25 ms 31992 KB Output is correct
48 Correct 23 ms 31992 KB Output is correct
49 Correct 24 ms 32000 KB Output is correct
50 Correct 24 ms 31992 KB Output is correct

Subtask #6
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 31616 KB Output is correct
2 Correct 22 ms 31744 KB Output is correct
3 Correct 23 ms 31616 KB Output is correct
4 Correct 23 ms 31744 KB Output is correct
5 Correct 23 ms 31616 KB Output is correct
6 Correct 23 ms 31616 KB Output is correct
7 Correct 22 ms 31616 KB Output is correct
8 Correct 21 ms 31616 KB Output is correct
9 Correct 22 ms 31616 KB Output is correct
10 Correct 22 ms 31616 KB Output is correct
11 Correct 23 ms 31616 KB Output is correct
12 Correct 21 ms 31744 KB Output is correct
13 Correct 29 ms 31744 KB Output is correct
14 Correct 23 ms 31744 KB Output is correct
15 Correct 30 ms 31992 KB Output is correct
16 Correct 23 ms 32000 KB Output is correct
17 Correct 22 ms 32000 KB Output is correct
18 Correct 24 ms 32000 KB Output is correct
19 Correct 25 ms 32000 KB Output is correct
20 Correct 22 ms 32032 KB Output is correct
21 Correct 24 ms 32000 KB Output is correct
22 Correct 26 ms 32000 KB Output is correct
23 Correct 26 ms 31992 KB Output is correct
24 Correct 24 ms 32000 KB Output is correct
25 Correct 24 ms 32000 KB Output is correct
26 Correct 25 ms 32000 KB Output is correct
27 Correct 25 ms 31988 KB Output is correct
28 Correct 25 ms 32000 KB Output is correct
29 Correct 25 ms 32000 KB Output is correct
30 Execution timed out 1100 ms 233524 KB Time limit exceeded
31 Halted 0 ms 0 KB -