oj.uz

Submission #853441

# Submission time Handle Problem Language Result Execution time Memory
853441 2023-09-24T11:03:45 Z hariaakas646 Divide and conquer (IZhO14_divide) C++17
100 / 100
 33 ms 11020 KB 
#include <bits/stdc++.h>

using namespace std;

#define scd(t) scanf("%d", &t)
#define scld(t) scanf("%ld", &t)
#define sclld(t) scanf("%lld", &t)
#define scc(t) scanf("%c", &t)
#define scs(t) scanf("%s", t)
#define scf(t) scanf("%f", &t)
#define sclf(t) scanf("%lf", &t)
#define forr(i, j, k) for (int i = j; i < k; i++)
#define frange(i, j) forr(i, 0, j)
#define all(cont) cont.begin(), cont.end()
#define mp make_pair
#define pb push_back
#define f first
#define s second
typedef long int li;
typedef unsigned long int uli;
typedef long long int lli;
typedef unsigned long long int ulli;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<lli> vll;
typedef vector<string> vs;
typedef vector<pii> vii;
typedef vector<vi> vvi;
typedef map<int, int> mpii;
typedef set<int> seti;
typedef multiset<int> mseti;
typedef long double ld;

void usaco()
{
    freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
//    freopen("problem.out", "w", stdout);
}

template <class T>
struct SegTree
{
    int size = 1, n;
    vector<T> segtree;
    vector<T> vec;

    T def; // Assign a value

    void init(int l, T defv)
    {
        n = l;
        def = defv;

        while (size < n)
            size *= 2;

        segtree.assign(2 * size, def);
        vec.assign(size, def);
    }

    T operation(T x, T y)
    {
        return max(x, y); // Any required operation
    }

    void recalculate(int x)
    {
        segtree[x] = operation(segtree[2 * x + 1], segtree[2 * x + 2]);
    }

    void build(int x, int l, int r)
    {
        if (l == r)
        {
            segtree[x] = vec[l];
            return;
        }
        int mid = (l + r) / 2;
        build(2 * x + 1, l, mid);
        build(2 * x + 2, mid + 1, r);
        recalculate(x);
    }

    void build()
    {
        build(0, 0, size - 1);
    }

    void set(int id, T val)
    {
        vec[id] = val;
    }

    void update(int x, int l, int r, int id, T val)
    {
        if (l == r)
        {
            segtree[x] = val;
            return;
        }
        int mid = (l + r) / 2;
        if (id <= mid)
        {
            update(2 * x + 1, l, mid, id, val);
        }
        else
        {
            update(2 * x + 2, mid + 1, r, id, val);
        }
        recalculate(x);
    }

    void update(int id, T val)
    {
        update(0, 0, size - 1, id, val);
    }

    int query(int x, int l, int r, int lx, T v)
    {
        if (lx > r)
        {
            return -1;
        }
        if(l == r) {
            if(segtree[x] >= v)
                return l;
            else return -1;
        }
        
        int mid = (l + r) / 2;
        if(segtree[2*x+2] >= v) {
            return query(2 * x + 2, mid + 1, r, lx, v);
        }
        else return query(2 * x + 1, l, mid, lx, v);
    }

    int query(int lx, T v)
    {
        return query(0, 0, size - 1, lx, v);
    }
};

int main() {
    // usaco();
    int n;
    scd(n);
    vll pos(n+1), gold(n+1), en(n+1), ppos(n+1), pgold(n+1), pen(n+1);

    forr(i, 1, n+1) {
        sclld(pos[i]);
        ppos[i] = ppos[i-1] + pos[i];
        sclld(gold[i]);
        pgold[i] = pgold[i-1] + gold[i];
        sclld(en[i]);
        pen[i] = pen[i-1] + en[i];
        // printf("%lld ", pgold[i]);
    }

    SegTree<lli> segtree;
    segtree.init(n+1, -1e18);

    forr(i, 1, n+1) {
        segtree.set(i, pen[i] - pos[i]);
    }

    segtree.build();
    lli ma = 0;
    forr(i, 1, n+1) {
        lli d = pen[i-1] - pos[i];
        int id = segtree.query(i, d);
        if(id != -1) {
            // printf("\n%d\n", id);
            ma = max(ma, pgold[id] - pgold[i-1]);
        }
    }
    printf("%lld", ma);

}

Compilation message

divide.cpp: In function 'void usaco()':
divide.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
divide.cpp: In function 'int main()':
divide.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
divide.cpp:147:5: note: in expansion of macro 'scd'
  147 |     scd(n);
      |     ^~~
divide.cpp:7:23: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 | #define sclld(t) scanf("%lld", &t)
      |                  ~~~~~^~~~~~~~~~~~
divide.cpp:151:9: note: in expansion of macro 'sclld'
  151 |         sclld(pos[i]);
      |         ^~~~~
divide.cpp:7:23: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 | #define sclld(t) scanf("%lld", &t)
      |                  ~~~~~^~~~~~~~~~~~
divide.cpp:153:9: note: in expansion of macro 'sclld'
  153 |         sclld(gold[i]);
      |         ^~~~~
divide.cpp:7:23: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 | #define sclld(t) scanf("%lld", &t)
      |                  ~~~~~^~~~~~~~~~~~
divide.cpp:155:9: note: in expansion of macro 'sclld'
  155 |         sclld(en[i]);
      |         ^~~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 432 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct

Subtask #2
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 432 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 600 KB Output is correct
23 Correct 2 ms 860 KB Output is correct
24 Correct 2 ms 856 KB Output is correct

Subtask #3
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 432 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 600 KB Output is correct
23 Correct 2 ms 860 KB Output is correct
24 Correct 2 ms 856 KB Output is correct
25 Correct 2 ms 856 KB Output is correct
26 Correct 3 ms 1368 KB Output is correct
27 Correct 3 ms 1372 KB Output is correct
28 Correct 13 ms 5216 KB Output is correct
29 Correct 14 ms 5464 KB Output is correct
30 Correct 31 ms 11020 KB Output is correct
31 Correct 25 ms 10064 KB Output is correct
32 Correct 25 ms 10020 KB Output is correct
33 Correct 25 ms 10064 KB Output is correct
34 Correct 27 ms 9812 KB Output is correct
35 Correct 30 ms 10364 KB Output is correct
36 Correct 33 ms 10320 KB Output is correct