Submission #284974

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
284974	2020-08-28T08:37:10 Z	achibasadzishvili	Discharging (NOI20_discharging)	C++17	38 / 100	984 ms	265432 KB

Discharging

#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){
  return a[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:55:13: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   55 |     scanf("%d",&n);
      |            ~^  ~~
      |             |  |
      |             |  long long int*
      |             int*
      |            %lld
Discharging.cpp:57:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   57 |         scanf("%d",&a[i]);
      |                ~^  ~~~~~
      |                 |  |
      |                 |  long long int*
      |                 int*
      |                %lld
Discharging.cpp:83:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |         for(int j=0; j<del[i].size(); j++){
      |                      ~^~~~~~~~~~~~~~
Discharging.cpp:55:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   55 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
Discharging.cpp:57:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |         scanf("%d",&a[i]);
      |         ~~~~~^~~~~~~~~~~~

Subtask #1
0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	20 ms	31608 KB	Output is correct
2	Correct	19 ms	31616 KB	Output is correct
3	Incorrect	19 ms	31616 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #2
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	22 ms	32000 KB	Output is correct
2	Correct	22 ms	32128 KB	Output is correct
3	Correct	22 ms	32000 KB	Output is correct
4	Correct	20 ms	32000 KB	Output is correct
5	Correct	33 ms	31992 KB	Output is correct
6	Correct	21 ms	32000 KB	Output is correct
7	Correct	38 ms	31996 KB	Output is correct
8	Correct	20 ms	32000 KB	Output is correct
9	Correct	22 ms	32000 KB	Output is correct
10	Correct	23 ms	32000 KB	Output is correct
11	Correct	20 ms	32000 KB	Output is correct
12	Correct	34 ms	31992 KB	Output is correct
13	Correct	21 ms	31992 KB	Output is correct
14	Correct	32 ms	32000 KB	Output is correct
15	Correct	22 ms	32000 KB	Output is correct

Subtask #3
25.0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	22 ms	32000 KB	Output is correct
2	Correct	22 ms	32128 KB	Output is correct
3	Correct	22 ms	32000 KB	Output is correct
4	Correct	20 ms	32000 KB	Output is correct
5	Correct	33 ms	31992 KB	Output is correct
6	Correct	21 ms	32000 KB	Output is correct
7	Correct	38 ms	31996 KB	Output is correct
8	Correct	20 ms	32000 KB	Output is correct
9	Correct	22 ms	32000 KB	Output is correct
10	Correct	23 ms	32000 KB	Output is correct
11	Correct	20 ms	32000 KB	Output is correct
12	Correct	34 ms	31992 KB	Output is correct
13	Correct	21 ms	31992 KB	Output is correct
14	Correct	32 ms	32000 KB	Output is correct
15	Correct	22 ms	32000 KB	Output is correct
16	Correct	825 ms	263412 KB	Output is correct
17	Correct	947 ms	263156 KB	Output is correct
18	Correct	753 ms	265432 KB	Output is correct
19	Correct	857 ms	262000 KB	Output is correct
20	Correct	860 ms	262128 KB	Output is correct
21	Correct	885 ms	263164 KB	Output is correct
22	Correct	827 ms	263156 KB	Output is correct
23	Correct	949 ms	260852 KB	Output is correct
24	Correct	889 ms	261536 KB	Output is correct
25	Correct	898 ms	260844 KB	Output is correct
26	Correct	964 ms	259252 KB	Output is correct
27	Correct	798 ms	264444 KB	Output is correct
28	Correct	905 ms	262392 KB	Output is correct
29	Correct	884 ms	260084 KB	Output is correct
30	Correct	984 ms	259952 KB	Output is correct