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Submission #284973

# Submission time Handle Problem Language Result Execution time Memory
284973 2020-08-28T08:36:44 Z achibasadzishvili Discharging (NOI20_discharging) C++17
36 / 100
 1000 ms 253048 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2,fma")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#define ll long long
#define f first
#define s second
#define pb push_back
using namespace std;
ll n,a[1000002];
ll dp[1000002],rm[1000002][21],po[2000002],pw[200],raod,mn;
ll lef[1000002],rig[1000002];
vector<ll>del[1000002];
ll get(ll x,ll y){
    ll lo = po[y - x + 1];
    if(rm[y][lo] > rm[x + pw[lo] - 1][lo])return rm[y][lo];
    return 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(lef[x] == rig[x] && lef[x] == -1)return;
    if(lef[x] == -1){
        lef[rig[x]] = -1;
        mn = rig[x];
        rig[x] = -1;
        return;
    }
    rig[lef[x]] = rig[x];
    lef[rig[x]] = lef[x];
    ll cur = ind(lef[x] , rig[x]);
    if(cur == -1){
        lef[x] = rig[x] = -1;
        return;
    }
    del[cur].pb(lef[x]);
    lef[x] = rig[x] = -1;
}
int main(){
    scanf("%d",&n);
    for(int i=1; i<=n; i++){
        scanf("%d",&a[i]);
    }
    //int cl = clock();
    //n = 1000000;
    //for(int i=1; i<=n; i++)
    //    a[i] = n-i+1;
    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=0; i<=n; i++)
        lef[i] = rig[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]);
        }
    }
    //cout << clock() - cl << '\n';
    for(int i=1; i<=n; i++){
        for(int j=0; j<del[i].size(); j++){
            delet(del[i][j]);
        }
        dp[i] = dp[mn] + get(mn + 1 , i) * (n - mn);
        rig[i - 1] = i;
        lef[i] = i - 1;
        ll cur = ind(i - 1 , i);
        if(cur != -1)
            del[cur].pb(i - 1);
    }
    //cout << "time: " << clock() - cl << " " << raod << '\n';
    cout << dp[n];
    
    
    return 0;
}

Compilation message

Discharging.cpp:5: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    5 | #pragma GCC optimization ("O3")
      | 
Discharging.cpp:6: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    6 | #pragma GCC optimization ("unroll-loops")
      | 
Discharging.cpp: In function 'int main()':
Discharging.cpp:54:13: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   54 |     scanf("%d",&n);
      |            ~^  ~~
      |             |  |
      |             |  long long int*
      |             int*
      |            %lld
Discharging.cpp:56:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   56 |         scanf("%d",&a[i]);
      |                ~^  ~~~~~
      |                 |  |
      |                 |  long long int*
      |                 int*
      |                %lld
Discharging.cpp:82:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |         for(int j=0; j<del[i].size(); j++){
      |                      ~^~~~~~~~~~~~~~
Discharging.cpp:54:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
Discharging.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   56 |         scanf("%d",&a[i]);
      |         ~~~~~^~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 31616 KB Output is correct
2 Correct 21 ms 31616 KB Output is correct
3 Correct 21 ms 31616 KB Output is correct
4 Correct 20 ms 31616 KB Output is correct
5 Correct 21 ms 31616 KB Output is correct
6 Correct 20 ms 31744 KB Output is correct
7 Correct 20 ms 31616 KB Output is correct
8 Correct 20 ms 31616 KB Output is correct
9 Correct 21 ms 31616 KB Output is correct
10 Correct 20 ms 31736 KB Output is correct
11 Correct 20 ms 31616 KB Output is correct
12 Correct 21 ms 31616 KB Output is correct
13 Correct 21 ms 31616 KB Output is correct
14 Correct 20 ms 31616 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32000 KB Output is correct
2 Correct 21 ms 32000 KB Output is correct
3 Correct 22 ms 32000 KB Output is correct
4 Correct 22 ms 32000 KB Output is correct
5 Correct 22 ms 32000 KB Output is correct
6 Correct 22 ms 32000 KB Output is correct
7 Correct 22 ms 31992 KB Output is correct
8 Correct 21 ms 32128 KB Output is correct
9 Correct 22 ms 32000 KB Output is correct
10 Correct 22 ms 31992 KB Output is correct
11 Correct 22 ms 32000 KB Output is correct
12 Correct 21 ms 32000 KB Output is correct
13 Correct 21 ms 32128 KB Output is correct
14 Correct 21 ms 32000 KB Output is correct
15 Correct 22 ms 32000 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32000 KB Output is correct
2 Correct 21 ms 32000 KB Output is correct
3 Correct 22 ms 32000 KB Output is correct
4 Correct 22 ms 32000 KB Output is correct
5 Correct 22 ms 32000 KB Output is correct
6 Correct 22 ms 32000 KB Output is correct
7 Correct 22 ms 31992 KB Output is correct
8 Correct 21 ms 32128 KB Output is correct
9 Correct 22 ms 32000 KB Output is correct
10 Correct 22 ms 31992 KB Output is correct
11 Correct 22 ms 32000 KB Output is correct
12 Correct 21 ms 32000 KB Output is correct
13 Correct 21 ms 32128 KB Output is correct
14 Correct 21 ms 32000 KB Output is correct
15 Correct 22 ms 32000 KB Output is correct
16 Execution timed out 1112 ms 248056 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 1115 ms 253048 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 31616 KB Output is correct
2 Correct 21 ms 31616 KB Output is correct
3 Correct 21 ms 31616 KB Output is correct
4 Correct 20 ms 31616 KB Output is correct
5 Correct 21 ms 31616 KB Output is correct
6 Correct 20 ms 31744 KB Output is correct
7 Correct 20 ms 31616 KB Output is correct
8 Correct 20 ms 31616 KB Output is correct
9 Correct 21 ms 31616 KB Output is correct
10 Correct 20 ms 31736 KB Output is correct
11 Correct 20 ms 31616 KB Output is correct
12 Correct 21 ms 31616 KB Output is correct
13 Correct 21 ms 31616 KB Output is correct
14 Correct 20 ms 31616 KB Output is correct
15 Correct 22 ms 32000 KB Output is correct
16 Correct 21 ms 32000 KB Output is correct
17 Correct 22 ms 32000 KB Output is correct
18 Correct 22 ms 32000 KB Output is correct
19 Correct 22 ms 32000 KB Output is correct
20 Correct 22 ms 32000 KB Output is correct
21 Correct 22 ms 31992 KB Output is correct
22 Correct 21 ms 32128 KB Output is correct
23 Correct 22 ms 32000 KB Output is correct
24 Correct 22 ms 31992 KB Output is correct
25 Correct 22 ms 32000 KB Output is correct
26 Correct 21 ms 32000 KB Output is correct
27 Correct 21 ms 32128 KB Output is correct
28 Correct 21 ms 32000 KB Output is correct
29 Correct 22 ms 32000 KB Output is correct
30 Correct 21 ms 32000 KB Output is correct
31 Correct 21 ms 32000 KB Output is correct
32 Correct 21 ms 32000 KB Output is correct
33 Correct 21 ms 32128 KB Output is correct
34 Correct 21 ms 32000 KB Output is correct
35 Correct 25 ms 32128 KB Output is correct
36 Correct 24 ms 32000 KB Output is correct
37 Correct 21 ms 32000 KB Output is correct
38 Correct 21 ms 32000 KB Output is correct
39 Correct 22 ms 32000 KB Output is correct
40 Correct 23 ms 32000 KB Output is correct
41 Correct 22 ms 32000 KB Output is correct
42 Correct 21 ms 32000 KB Output is correct
43 Correct 22 ms 32000 KB Output is correct
44 Correct 21 ms 32000 KB Output is correct
45 Correct 21 ms 32000 KB Output is correct
46 Correct 22 ms 32000 KB Output is correct
47 Correct 21 ms 32000 KB Output is correct
48 Correct 23 ms 32000 KB Output is correct
49 Correct 24 ms 32000 KB Output is correct
50 Correct 21 ms 32000 KB Output is correct

Subtask #6
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 31616 KB Output is correct
2 Correct 21 ms 31616 KB Output is correct
3 Correct 21 ms 31616 KB Output is correct
4 Correct 20 ms 31616 KB Output is correct
5 Correct 21 ms 31616 KB Output is correct
6 Correct 20 ms 31744 KB Output is correct
7 Correct 20 ms 31616 KB Output is correct
8 Correct 20 ms 31616 KB Output is correct
9 Correct 21 ms 31616 KB Output is correct
10 Correct 20 ms 31736 KB Output is correct
11 Correct 20 ms 31616 KB Output is correct
12 Correct 21 ms 31616 KB Output is correct
13 Correct 21 ms 31616 KB Output is correct
14 Correct 20 ms 31616 KB Output is correct
15 Correct 22 ms 32000 KB Output is correct
16 Correct 21 ms 32000 KB Output is correct
17 Correct 22 ms 32000 KB Output is correct
18 Correct 22 ms 32000 KB Output is correct
19 Correct 22 ms 32000 KB Output is correct
20 Correct 22 ms 32000 KB Output is correct
21 Correct 22 ms 31992 KB Output is correct
22 Correct 21 ms 32128 KB Output is correct
23 Correct 22 ms 32000 KB Output is correct
24 Correct 22 ms 31992 KB Output is correct
25 Correct 22 ms 32000 KB Output is correct
26 Correct 21 ms 32000 KB Output is correct
27 Correct 21 ms 32128 KB Output is correct
28 Correct 21 ms 32000 KB Output is correct
29 Correct 22 ms 32000 KB Output is correct
30 Execution timed out 1112 ms 248056 KB Time limit exceeded
31 Halted 0 ms 0 KB -