oj.uz

Submission #800465

# Submission time Handle Problem Language Result Execution time Memory
800465 2023-08-01T15:09:30 Z GrindMachine Feast (NOI19_feast) C++17
53 / 100
 1000 ms 10912 KB 
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*

refs:
edi

*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

void solve(int test_case)
{
    ll n,k; cin >> n >> k;
    vector<ll> a(n+5);
    rep1(i,n) cin >> a[i];

    vector<ll> b;
    b.pb(a[1]);
    
    for(int i = 2; i <= n; ++i){
        bool diff = false;
        if(a[i] < 0 and b.back() > 0) diff = true;
        if(a[i] > 0 and b.back() < 0) diff = true;
        if(diff){
            b.pb(a[i]);
        }
        else{
            b.back() += a[i];
        }
    } 

    if(b.front() <= 0){
        b.erase(b.begin());
    }
    if(sz(b) and b.back() <= 0){
        b.pop_back();
    }

    ll ans = 0;

    while(true){
        vector<ll> positives;
        rep(i,sz(b)){
            if(b[i] > 0){
                positives.pb(b[i]);
            }
        }

        sort(rall(positives));

        ll val = 0;
        rep(i,min((ll)sz(positives),k)){
            val += positives[i];
        }

        amax(ans,val);

        if(sz(positives) <= k) break;
        
        ll mn_abs = inf2, pos = -1;
        rep(i,sz(b)){
            if(abs(b[i]) < mn_abs){
                mn_abs = abs(b[i]);
                pos = i;
            }
        }

        b.insert(b.begin(),0);
        b.pb(0);

        pos++;

        b[pos] += b[pos-1];
        b[pos] += b[pos+1];
        b[pos-1] = b[pos+1] = 0;

        vector<ll> c;
        c.pb(b[0]);

        rep1(i,(ll)sz(b)-1){
            bool diff = false;
            if(b[i] < 0 and c.back() > 0) diff = true;
            if(b[i] > 0 and c.back() < 0) diff = true;
            if(diff){
                c.pb(b[i]);
            }
            else{
                c.back() += b[i];
            }
        }

        if(c.front() <= 0){
            c.erase(c.begin());
        }
        if(sz(c) and c.back() <= 0){
            c.pop_back();
        }

        b = c;
    }

    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Compilation message

feast.cpp: In function 'void solve(int)':
feast.cpp:30:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 | #define rep(i, n) for(int i = 0; i < n; ++i)
      |                                    ^
feast.cpp:95:9: note: in expansion of macro 'rep'
   95 |         rep(i,sz(b)){
      |         ^~~
feast.cpp:110:26: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
  110 |         if(sz(positives) <= k) break;
      |                          ^
feast.cpp:30:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 | #define rep(i, n) for(int i = 0; i < n; ++i)
      |                                    ^
feast.cpp:113:9: note: in expansion of macro 'rep'
  113 |         rep(i,sz(b)){
      |         ^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 5260 KB Output is correct
2 Correct 28 ms 5444 KB Output is correct
3 Correct 25 ms 5480 KB Output is correct
4 Correct 24 ms 5456 KB Output is correct
5 Correct 24 ms 5444 KB Output is correct
6 Correct 24 ms 5324 KB Output is correct
7 Correct 24 ms 5332 KB Output is correct
8 Correct 25 ms 5452 KB Output is correct
9 Correct 25 ms 5396 KB Output is correct
10 Correct 24 ms 5428 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 3632 KB Output is correct
2 Correct 16 ms 3816 KB Output is correct
3 Correct 19 ms 3668 KB Output is correct
4 Correct 17 ms 3652 KB Output is correct
5 Correct 24 ms 5264 KB Output is correct
6 Correct 16 ms 3660 KB Output is correct
7 Correct 16 ms 3816 KB Output is correct
8 Correct 25 ms 5460 KB Output is correct
9 Correct 25 ms 5280 KB Output is correct
10 Correct 16 ms 3680 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1059 ms 10912 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 316 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 228 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 316 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 228 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 316 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 228 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 316 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 320 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 4 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 2 ms 340 KB Output is correct
24 Correct 5 ms 340 KB Output is correct
25 Correct 5 ms 340 KB Output is correct
26 Correct 5 ms 340 KB Output is correct
27 Correct 4 ms 340 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 340 KB Output is correct
30 Correct 5 ms 340 KB Output is correct

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 5260 KB Output is correct
2 Correct 28 ms 5444 KB Output is correct
3 Correct 25 ms 5480 KB Output is correct
4 Correct 24 ms 5456 KB Output is correct
5 Correct 24 ms 5444 KB Output is correct
6 Correct 24 ms 5324 KB Output is correct
7 Correct 24 ms 5332 KB Output is correct
8 Correct 25 ms 5452 KB Output is correct
9 Correct 25 ms 5396 KB Output is correct
10 Correct 24 ms 5428 KB Output is correct
11 Correct 16 ms 3632 KB Output is correct
12 Correct 16 ms 3816 KB Output is correct
13 Correct 19 ms 3668 KB Output is correct
14 Correct 17 ms 3652 KB Output is correct
15 Correct 24 ms 5264 KB Output is correct
16 Correct 16 ms 3660 KB Output is correct
17 Correct 16 ms 3816 KB Output is correct
18 Correct 25 ms 5460 KB Output is correct
19 Correct 25 ms 5280 KB Output is correct
20 Correct 16 ms 3680 KB Output is correct
21 Execution timed out 1059 ms 10912 KB Time limit exceeded
22 Halted 0 ms 0 KB -