oj.uz

Submission #1113191

# Submission time Handle Problem Language Result Execution time Memory
1113191 2024-11-16T03:19:32 Z kzhi Feast (NOI19_feast) C++14
71 / 100
 141 ms 63568 KB 
/*
    Author : kmv a.k.a kzhi
    K41 IT CHV
*/
#include <bits/stdc++.h>
using namespace std;


//#define int long long
#define ll long long
#define FOR(i,a,b) for (int i = a ; i <= b; ++ i)
#define FOD(i,a,b) for (int i = a; i >= b; -- i)


#define BIT(mask,i)       ((mask >> i) & 1)
#define MASK(i)                (1ll << (i))
#define OFFBIT(mask,i)  (mask &~(1ll<<(i)))
#define ONBIT(mask,i) (mask | (1ll << (i)))
#define lg2(x)    (63 - __builtin_clzll(x))
#define c_bit          __builtin_popcountll

#define vi vector < int >
#define all(a) a.begin(), a.end()
#define pb push_back

#define ii pair<int,int>
#define pll pair < ll, ll >
#define fi first
#define se second

#define openfile(TASK) if (fopen(TASK".inp","r"))\
        {freopen(TASK".inp","r",stdin);freopen(TASK".out","w",stdout);}
#define endl '\n'
#define Faster ios_base::sync_with_stdio(false); \
                        cin.tie(0);  cout.tie(0);

#define mid(l,r) ((l + r) >> 1)
#define left(id) (id << 1)
#define right(id) ((id << 1) | 1)
#define ci const int

template <class X, class Y> bool maximize(X &a, const Y &b){if(a < b) return a = b, true;return false;}
template <class X, class Y> bool minimize(X &a, const Y &b){if(a > b) return a = b, true;return false;}

const int N = 3e5 + 5;
const ll oo = 1e17 + 7;
const int LOG = lg2(N);

int n, k;
int a[N];
ll t[N];

ll sum(int l, int r){
    if (l > r)
        return 0;
    return t[r] - t[l - 1];
}

bool ok1 = 1;
int cnt2 = 0, pos2 = -1;

namespace SUB1{
    ll pt[N];

    void SOLVE(){
        pt[0] = oo;
        ll res = - oo;

        FOR (i, 1, n){
            pt[i] = min(t[i], pt[i - 1]);
            maximize(res, t[i] - pt[i - 1]);
            maximize(res, t[i]);
        }

        maximize(res, 0ll);
        cout << res;
    }
}

namespace SUB6{
    static const int maxN = 2e3 + 5;

    ll dp[maxN][maxN][2];

    ll sol(int i, int cnt, bool ok){
        if (i == n + 1 || cnt == k + 1)
            return 0;
        if (dp[i][cnt][ok] != - oo)
            return dp[i][cnt][ok];
        ll cur = - oo;

        if (!ok){
            maximize(cur, sol(i + 1, cnt, 1) + a[i]);

            maximize(cur, sol(i + 1, cnt, 0));
        }
        else{
            maximize(cur, sol(i + 1, cnt, 1) + a[i]);

            maximize(cur, sol(i + 1, cnt + 1, 0) + max(a[i], 0));
        }

        return dp[i][cnt][ok] = cur;
    }

    void SOLVE(){
        FOR (i, 0, maxN - 1)
            FOR (j, 0, maxN - 1)
                FOR (ok, 0, 1)
                    dp[i][j][ok] = - oo;


        cout << sol(1, 1, 0);
    }
}

namespace FULL {
    pll dp[N][2];

    void calc(int mid){
        dp[1][0] = {0, 0}, dp[1][1] = {a[1] - mid, 1};
        for(int i = 2; i <= n; i++){
            dp[i][0] = max(dp[i - 1][0], dp[i - 1][1]);
            dp[i][1] = max(make_pair(dp[i - 1][0].first + a[i] - mid, dp[i - 1][0].second + 1), make_pair(dp[i - 1][1].first + a[i], dp[i - 1][1].second));
        }
    }

    void SOLVE(){
        ll l = -1, r = oo;

        while (l + 1 < r){
            ll mid = mid(l, r);
            calc(mid);

            if(max(dp[n][0], dp[n][1]).second >= k)
                l = mid;
            else
                r = mid;
        }

        calc(l);

        cout << l * k + max(dp[n][0], dp[n][1]).fi;
    }
}

void SOLVE(){
    cin >> n >> k;

    FOR (i, 1, n){
        cin >> a[i];
        t[i] = t[i - 1] + a[i];
        if (a[i] < 0){
            ok1 = 0;
            cnt2 ++;
            pos2 = i;
        }
    }

    if (ok1){
        cout << t[n];
        return;
    }

    if (cnt2 == 1){
        if (k >= 2)
            cout << t[n] - a[pos2];
        else
            cout << max({t[n], sum(1, pos2 - 1), sum(pos2 + 1, n)});
        return;
    }

    if (k == 1){
        SUB1 :: SOLVE();
        return;
    }

    if (n <= 2000 && k <= 2000){
        SUB6 :: SOLVE();
        return;
    }

    FULL :: SOLVE();
}

signed main(){
    Faster
    openfile("feast")

    int q = 1;

//    cin >> q;

    while (q --){
        SOLVE();
    }

    return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:32:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         {freopen(TASK".inp","r",stdin);freopen(TASK".out","w",stdout);}
      |          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
feast.cpp:188:5: note: in expansion of macro 'openfile'
  188 |     openfile("feast")
      |     ^~~~~~~~
feast.cpp:32:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         {freopen(TASK".inp","r",stdin);freopen(TASK".out","w",stdout);}
      |                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
feast.cpp:188:5: note: in expansion of macro 'openfile'
  188 |     openfile("feast")
      |     ^~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 3664 KB Output is correct
2 Correct 26 ms 6076 KB Output is correct
3 Correct 25 ms 3924 KB Output is correct
4 Correct 23 ms 3920 KB Output is correct
5 Correct 23 ms 3900 KB Output is correct
6 Correct 25 ms 4936 KB Output is correct
7 Correct 25 ms 6012 KB Output is correct
8 Correct 23 ms 3920 KB Output is correct
9 Correct 22 ms 3884 KB Output is correct
10 Correct 27 ms 4276 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 3664 KB Output is correct
2 Correct 17 ms 4996 KB Output is correct
3 Correct 16 ms 3676 KB Output is correct
4 Correct 17 ms 4944 KB Output is correct
5 Correct 22 ms 4052 KB Output is correct
6 Correct 16 ms 3664 KB Output is correct
7 Correct 18 ms 4944 KB Output is correct
8 Correct 22 ms 3920 KB Output is correct
9 Correct 38 ms 3856 KB Output is correct
10 Correct 15 ms 3920 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 6224 KB Output is correct
2 Correct 35 ms 6352 KB Output is correct
3 Correct 33 ms 6240 KB Output is correct
4 Correct 26 ms 6136 KB Output is correct
5 Correct 27 ms 6216 KB Output is correct
6 Correct 29 ms 6236 KB Output is correct
7 Correct 28 ms 6224 KB Output is correct
8 Correct 31 ms 6452 KB Output is correct
9 Correct 27 ms 6316 KB Output is correct
10 Correct 28 ms 6224 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 42 ms 63304 KB Output is correct
3 Correct 43 ms 63364 KB Output is correct
4 Correct 45 ms 63304 KB Output is correct
5 Correct 44 ms 63312 KB Output is correct
6 Correct 43 ms 63304 KB Output is correct
7 Correct 42 ms 63264 KB Output is correct
8 Correct 45 ms 63304 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 44 ms 63244 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 42 ms 63304 KB Output is correct
3 Correct 43 ms 63364 KB Output is correct
4 Correct 45 ms 63304 KB Output is correct
5 Correct 44 ms 63312 KB Output is correct
6 Correct 43 ms 63304 KB Output is correct
7 Correct 42 ms 63264 KB Output is correct
8 Correct 45 ms 63304 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 44 ms 63244 KB Output is correct
11 Correct 43 ms 63228 KB Output is correct
12 Correct 43 ms 63324 KB Output is correct
13 Correct 44 ms 63436 KB Output is correct
14 Correct 43 ms 63332 KB Output is correct
15 Correct 45 ms 63292 KB Output is correct
16 Correct 42 ms 63304 KB Output is correct
17 Correct 45 ms 63312 KB Output is correct
18 Correct 44 ms 63320 KB Output is correct
19 Correct 42 ms 63208 KB Output is correct
20 Correct 41 ms 63300 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 42 ms 63304 KB Output is correct
3 Correct 43 ms 63364 KB Output is correct
4 Correct 45 ms 63304 KB Output is correct
5 Correct 44 ms 63312 KB Output is correct
6 Correct 43 ms 63304 KB Output is correct
7 Correct 42 ms 63264 KB Output is correct
8 Correct 45 ms 63304 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 44 ms 63244 KB Output is correct
11 Correct 43 ms 63228 KB Output is correct
12 Correct 43 ms 63324 KB Output is correct
13 Correct 44 ms 63436 KB Output is correct
14 Correct 43 ms 63332 KB Output is correct
15 Correct 45 ms 63292 KB Output is correct
16 Correct 42 ms 63304 KB Output is correct
17 Correct 45 ms 63312 KB Output is correct
18 Correct 44 ms 63320 KB Output is correct
19 Correct 42 ms 63208 KB Output is correct
20 Correct 41 ms 63300 KB Output is correct
21 Correct 52 ms 63560 KB Output is correct
22 Correct 69 ms 63420 KB Output is correct
23 Correct 59 ms 63388 KB Output is correct
24 Correct 51 ms 63560 KB Output is correct
25 Correct 55 ms 63560 KB Output is correct
26 Correct 49 ms 63560 KB Output is correct
27 Correct 54 ms 63568 KB Output is correct
28 Correct 44 ms 63536 KB Output is correct
29 Correct 45 ms 63560 KB Output is correct
30 Correct 43 ms 63452 KB Output is correct

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 3664 KB Output is correct
2 Correct 26 ms 6076 KB Output is correct
3 Correct 25 ms 3924 KB Output is correct
4 Correct 23 ms 3920 KB Output is correct
5 Correct 23 ms 3900 KB Output is correct
6 Correct 25 ms 4936 KB Output is correct
7 Correct 25 ms 6012 KB Output is correct
8 Correct 23 ms 3920 KB Output is correct
9 Correct 22 ms 3884 KB Output is correct
10 Correct 27 ms 4276 KB Output is correct
11 Correct 15 ms 3664 KB Output is correct
12 Correct 17 ms 4996 KB Output is correct
13 Correct 16 ms 3676 KB Output is correct
14 Correct 17 ms 4944 KB Output is correct
15 Correct 22 ms 4052 KB Output is correct
16 Correct 16 ms 3664 KB Output is correct
17 Correct 18 ms 4944 KB Output is correct
18 Correct 22 ms 3920 KB Output is correct
19 Correct 38 ms 3856 KB Output is correct
20 Correct 15 ms 3920 KB Output is correct
21 Correct 28 ms 6224 KB Output is correct
22 Correct 35 ms 6352 KB Output is correct
23 Correct 33 ms 6240 KB Output is correct
24 Correct 26 ms 6136 KB Output is correct
25 Correct 27 ms 6216 KB Output is correct
26 Correct 29 ms 6236 KB Output is correct
27 Correct 28 ms 6224 KB Output is correct
28 Correct 31 ms 6452 KB Output is correct
29 Correct 27 ms 6316 KB Output is correct
30 Correct 28 ms 6224 KB Output is correct
31 Correct 1 ms 336 KB Output is correct
32 Correct 42 ms 63304 KB Output is correct
33 Correct 43 ms 63364 KB Output is correct
34 Correct 45 ms 63304 KB Output is correct
35 Correct 44 ms 63312 KB Output is correct
36 Correct 43 ms 63304 KB Output is correct
37 Correct 42 ms 63264 KB Output is correct
38 Correct 45 ms 63304 KB Output is correct
39 Correct 1 ms 336 KB Output is correct
40 Correct 44 ms 63244 KB Output is correct
41 Correct 43 ms 63228 KB Output is correct
42 Correct 43 ms 63324 KB Output is correct
43 Correct 44 ms 63436 KB Output is correct
44 Correct 43 ms 63332 KB Output is correct
45 Correct 45 ms 63292 KB Output is correct
46 Correct 42 ms 63304 KB Output is correct
47 Correct 45 ms 63312 KB Output is correct
48 Correct 44 ms 63320 KB Output is correct
49 Correct 42 ms 63208 KB Output is correct
50 Correct 41 ms 63300 KB Output is correct
51 Correct 52 ms 63560 KB Output is correct
52 Correct 69 ms 63420 KB Output is correct
53 Correct 59 ms 63388 KB Output is correct
54 Correct 51 ms 63560 KB Output is correct
55 Correct 55 ms 63560 KB Output is correct
56 Correct 49 ms 63560 KB Output is correct
57 Correct 54 ms 63568 KB Output is correct
58 Correct 44 ms 63536 KB Output is correct
59 Correct 45 ms 63560 KB Output is correct
60 Correct 43 ms 63452 KB Output is correct
61 Incorrect 141 ms 12880 KB Output isn't correct
62 Halted 0 ms 0 KB -