oj.uz

Submission #254817

# Submission time Handle Problem Language Result Execution time Memory
254817 2020-07-30T16:13:41 Z Mercenary Feast (NOI19_feast) C++14
100 / 100
 226 ms 138232 KB 
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>

#define pb push_back
#define mp make_pair
#define taskname "A"
#define int long long
using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;
const int maxn = 3e5 + 5;
struct Node{
    int sum , pre , suf , res;
    int ppre , psuf , pl , pr;
    Node(){};
    Node(int sum , int pre , int suf , int res,int ppre , int psuf , int pl , int pr)
        :sum(sum),pre(pre),suf(suf),res(res),ppre(ppre),psuf(psuf),pl(pl),pr(pr){};
    Node operator + (const Node other){
        if(ppre == -1)return other;
        if(other.ppre == -1)return (*this);
        Node ans;
        if(res < other.res)ans = other;
        else ans = (*this);
        ans.sum = sum + other.sum;
        if(pre > sum + other.pre){
            ans.pre = pre;
            ans.ppre = ppre;
        }else{
            ans.pre = sum + other.pre;
            ans.ppre = other.ppre;
        }
        if(other.suf > other.sum + suf){
            ans.suf = other.suf;
            ans.psuf = other.psuf;
        }else{
            ans.suf = other.sum + suf;
            ans.psuf = psuf;
        }
        if(ans.res < suf + other.pre){
            ans.res = suf + other.pre;
            ans.pl = psuf;
            ans.pr = other.ppre;
        }
        return ans;
    }
}s[maxn * 4] , rs[maxn * 4];
int n , k;
bool lz[maxn * 4];
int a[maxn];
void Build(int x , int l , int r){
    if(l == r){
        s[x] = Node(a[l],a[l],a[l],a[l],l,l,l,l);
        rs[x] = Node(-a[l],-a[l],-a[l],-a[l],l,l,l,l);
        return;
    }
    int mid = l + r >> 1;
    Build(x*2,l,mid);
    Build(x*2+1,mid+1,r);
    s[x] = s[x * 2] + s[x * 2 + 1];
    rs[x] = rs[x * 2] + rs[x * 2 + 1];
}
void Push(int x , bool key){
    if(lz[x])swap(s[x],rs[x]);
    if(key){
        lz[x * 2] ^= lz[x];
        lz[x * 2 + 1] ^= lz[x];
    }
    lz[x] = 0;
}
void update(int x , int l , int r , int pos ,int val){
    Push(x,l!=r);
    if(l == r){
        a[l] = val;
        s[x] = Node(a[l],a[l],a[l],a[l],l,l,l,l);
        rs[x] = Node(-a[l],-a[l],-a[l],-a[l],l,l,l,l);
        lz[x] = 0;
        return;
    }
    int mid = l + r >> 1;
    if(pos <= mid)update(x*2,l,mid,pos,val);
    else update(x*2+1,mid+1,r,pos,val);
    s[x] = s[x * 2] + s[x * 2 + 1];
    rs[x] = rs[x * 2] + rs[x * 2 + 1];
}

void Rev(int x , int l , int r , int L , int R){
    Push(x,l!=r);
    if(L > r || l > R)return;
    if(L <= l && r <= R){
        lz[x] ^= 1;
        Push(x,l!=r);
        return;
    }
    int mid = l + r >> 1;
    Rev(x*2,l,mid,L,R);Rev(x*2+1,mid+1,r,L,R);
    s[x] = s[x * 2] + s[x * 2 + 1];
    rs[x] = rs[x * 2] + rs[x * 2 + 1];
}
Node Query(int x , int l , int r , int L , int R){
    Push(x,l!=r);
    if(L > r || l > R)return Node(-1,-1,-1,-1,-1,-1,-1,-1);
    if(L <= l && r <= R)return s[x];
    int mid = l + r >> 1;
    return Query(x*2,l,mid,L,R)+Query(x*2+1,mid+1,r,L,R);
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen(taskname".INP","r")){
		freopen(taskname".INP", "r",stdin);
		freopen(taskname".OUT", "w",stdout);
    }
    cin >> n >> k;
    for(int i = 1 ; i <= n ; ++i){
        cin >> a[i];
    }
    Build(1,1,n);
    ll res = 0;
    while(k--){
        if(s[1].res <= 0)break;
        res += s[1].res;
        Rev(1,1,n,s[1].pl,s[1].pr);
    }
    cout << res;
}

Compilation message

feast.cpp: In function 'void Build(long long int, long long int, long long int)':
feast.cpp:60:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid = l + r >> 1;
               ~~^~~
feast.cpp: In function 'void update(long long int, long long int, long long int, long long int, long long int)':
feast.cpp:83:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid = l + r >> 1;
               ~~^~~
feast.cpp: In function 'void Rev(long long int, long long int, long long int, long long int, long long int)':
feast.cpp:98:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid = l + r >> 1;
               ~~^~~
feast.cpp: In function 'Node Query(long long int, long long int, long long int, long long int, long long int)':
feast.cpp:107:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int mid = l + r >> 1;
               ~~^~~
feast.cpp: In function 'int32_t main()':
feast.cpp:116:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".INP", "r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
feast.cpp:117:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".OUT", "w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 136824 KB Output is correct
2 Correct 103 ms 136824 KB Output is correct
3 Correct 108 ms 136952 KB Output is correct
4 Correct 104 ms 136824 KB Output is correct
5 Correct 107 ms 136824 KB Output is correct
6 Correct 108 ms 136936 KB Output is correct
7 Correct 107 ms 136824 KB Output is correct
8 Correct 108 ms 136824 KB Output is correct
9 Correct 107 ms 136824 KB Output is correct
10 Correct 108 ms 136824 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 86 ms 135032 KB Output is correct
2 Correct 85 ms 135160 KB Output is correct
3 Correct 93 ms 135176 KB Output is correct
4 Correct 90 ms 135160 KB Output is correct
5 Correct 107 ms 136824 KB Output is correct
6 Correct 85 ms 135032 KB Output is correct
7 Correct 84 ms 135160 KB Output is correct
8 Correct 103 ms 136824 KB Output is correct
9 Correct 108 ms 136696 KB Output is correct
10 Correct 94 ms 135160 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 123 ms 137080 KB Output is correct
2 Correct 121 ms 136984 KB Output is correct
3 Correct 116 ms 137100 KB Output is correct
4 Correct 112 ms 137080 KB Output is correct
5 Correct 122 ms 137080 KB Output is correct
6 Correct 127 ms 137080 KB Output is correct
7 Correct 112 ms 137080 KB Output is correct
8 Correct 116 ms 137084 KB Output is correct
9 Correct 116 ms 137192 KB Output is correct
10 Correct 111 ms 137080 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 512 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 1 ms 512 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 512 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 1 ms 512 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct
21 Correct 1 ms 896 KB Output is correct
22 Correct 2 ms 896 KB Output is correct
23 Correct 1 ms 896 KB Output is correct
24 Correct 1 ms 896 KB Output is correct
25 Correct 2 ms 896 KB Output is correct
26 Correct 2 ms 896 KB Output is correct
27 Correct 1 ms 1024 KB Output is correct
28 Correct 1 ms 896 KB Output is correct
29 Correct 1 ms 896 KB Output is correct
30 Correct 1 ms 896 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 136824 KB Output is correct
2 Correct 103 ms 136824 KB Output is correct
3 Correct 108 ms 136952 KB Output is correct
4 Correct 104 ms 136824 KB Output is correct
5 Correct 107 ms 136824 KB Output is correct
6 Correct 108 ms 136936 KB Output is correct
7 Correct 107 ms 136824 KB Output is correct
8 Correct 108 ms 136824 KB Output is correct
9 Correct 107 ms 136824 KB Output is correct
10 Correct 108 ms 136824 KB Output is correct
11 Correct 86 ms 135032 KB Output is correct
12 Correct 85 ms 135160 KB Output is correct
13 Correct 93 ms 135176 KB Output is correct
14 Correct 90 ms 135160 KB Output is correct
15 Correct 107 ms 136824 KB Output is correct
16 Correct 85 ms 135032 KB Output is correct
17 Correct 84 ms 135160 KB Output is correct
18 Correct 103 ms 136824 KB Output is correct
19 Correct 108 ms 136696 KB Output is correct
20 Correct 94 ms 135160 KB Output is correct
21 Correct 123 ms 137080 KB Output is correct
22 Correct 121 ms 136984 KB Output is correct
23 Correct 116 ms 137100 KB Output is correct
24 Correct 112 ms 137080 KB Output is correct
25 Correct 122 ms 137080 KB Output is correct
26 Correct 127 ms 137080 KB Output is correct
27 Correct 112 ms 137080 KB Output is correct
28 Correct 116 ms 137084 KB Output is correct
29 Correct 116 ms 137192 KB Output is correct
30 Correct 111 ms 137080 KB Output is correct
31 Correct 0 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 0 ms 384 KB Output is correct
34 Correct 0 ms 384 KB Output is correct
35 Correct 0 ms 384 KB Output is correct
36 Correct 0 ms 384 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 0 ms 384 KB Output is correct
39 Correct 0 ms 384 KB Output is correct
40 Correct 0 ms 384 KB Output is correct
41 Correct 0 ms 512 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 1 ms 512 KB Output is correct
44 Correct 1 ms 512 KB Output is correct
45 Correct 1 ms 512 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 512 KB Output is correct
48 Correct 1 ms 512 KB Output is correct
49 Correct 1 ms 512 KB Output is correct
50 Correct 1 ms 512 KB Output is correct
51 Correct 1 ms 896 KB Output is correct
52 Correct 2 ms 896 KB Output is correct
53 Correct 1 ms 896 KB Output is correct
54 Correct 1 ms 896 KB Output is correct
55 Correct 2 ms 896 KB Output is correct
56 Correct 2 ms 896 KB Output is correct
57 Correct 1 ms 1024 KB Output is correct
58 Correct 1 ms 896 KB Output is correct
59 Correct 1 ms 896 KB Output is correct
60 Correct 1 ms 896 KB Output is correct
61 Correct 200 ms 137976 KB Output is correct
62 Correct 226 ms 138176 KB Output is correct
63 Correct 120 ms 138104 KB Output is correct
64 Correct 201 ms 138104 KB Output is correct
65 Correct 166 ms 138104 KB Output is correct
66 Correct 171 ms 138232 KB Output is correct
67 Correct 161 ms 137976 KB Output is correct
68 Correct 115 ms 137976 KB Output is correct
69 Correct 111 ms 137724 KB Output is correct
70 Correct 110 ms 137080 KB Output is correct