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Submission #284897

# Submission time Handle Problem Language Result Execution time Memory
284897 2020-08-28T07:50:05 Z achibasadzishvili Discharging (NOI20_discharging) C++17
9 / 100
 1000 ms 242656 KB 
#include<bits/stdc++.h>
#pragma GCC diagnostic warning "-std=c++11"
#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;
int n,a[1000002];
ll dp[1000002],rm[1000002][21],po[2000002],pw[200],raod,mn;
int lef[1000002],rig[1000002];
vector<ll>del[1000002];
set<int>st;
set<int>::iterator it;
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(rig[x] == -1){
        rig[lef[x]] = -1;
        return;
    }
    if(lef[x] == -1){
        lef[rig[x]] = -1;
        mn = rig[x];
        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]);
    if(lef[x] == mn)mn = rig[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] = 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=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:6: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    6 | #pragma GCC optimization ("O3")
      | 
Discharging.cpp:7: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    7 | #pragma GCC optimization ("unroll-loops")
      | 
Discharging.cpp:2:32: warning: '-std=c++11' is not an option that controls warnings [-Wpragmas]
    2 | #pragma GCC diagnostic warning "-std=c++11"
      |                                ^~~~~~~~~~~~
Discharging.cpp: In function 'int main()':
Discharging.cpp:89:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |         for(int j=0; j<del[i].size(); j++){
      |                      ~^~~~~~~~~~~~~~
Discharging.cpp:65:9: warning: unused variable 'cl' [-Wunused-variable]
   65 |     int cl = clock();
      |         ^~
Discharging.cpp:61:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   61 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
Discharging.cpp:63:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   63 |         scanf("%d",&a[i]);
      |         ~~~~~^~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 31608 KB Output is correct
2 Correct 20 ms 31616 KB Output is correct
3 Correct 21 ms 31616 KB Output is correct
4 Correct 21 ms 31616 KB Output is correct
5 Correct 21 ms 31616 KB Output is correct
6 Correct 21 ms 31616 KB Output is correct
7 Correct 21 ms 31616 KB Output is correct
8 Correct 21 ms 31616 KB Output is correct
9 Correct 20 ms 31616 KB Output is correct
10 Correct 21 ms 31616 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 21 ms 31616 KB Output is correct

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32000 KB Output is correct
2 Incorrect 22 ms 32000 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 32000 KB Output is correct
2 Incorrect 22 ms 32000 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1114 ms 242656 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 31608 KB Output is correct
2 Correct 20 ms 31616 KB Output is correct
3 Correct 21 ms 31616 KB Output is correct
4 Correct 21 ms 31616 KB Output is correct
5 Correct 21 ms 31616 KB Output is correct
6 Correct 21 ms 31616 KB Output is correct
7 Correct 21 ms 31616 KB Output is correct
8 Correct 21 ms 31616 KB Output is correct
9 Correct 20 ms 31616 KB Output is correct
10 Correct 21 ms 31616 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 21 ms 31616 KB Output is correct
15 Correct 22 ms 32000 KB Output is correct
16 Incorrect 22 ms 32000 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #6
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 31608 KB Output is correct
2 Correct 20 ms 31616 KB Output is correct
3 Correct 21 ms 31616 KB Output is correct
4 Correct 21 ms 31616 KB Output is correct
5 Correct 21 ms 31616 KB Output is correct
6 Correct 21 ms 31616 KB Output is correct
7 Correct 21 ms 31616 KB Output is correct
8 Correct 21 ms 31616 KB Output is correct
9 Correct 20 ms 31616 KB Output is correct
10 Correct 21 ms 31616 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 21 ms 31616 KB Output is correct
15 Correct 22 ms 32000 KB Output is correct
16 Incorrect 22 ms 32000 KB Output isn't correct
17 Halted 0 ms 0 KB -