Submission #116146

#	Time	Username	Problem	Language	Result	Execution time	Memory
116146		RezwanArefin01	Holiday (IOI14_holiday)	C++17	0 / 100	37 ms	7928 KiB

holiday

#include <bits/stdc++.h>
#include "holiday.h"
using namespace std;

typedef long long ll;

const int N = 1e5 + 10;
int pos[N], p[N];

struct Node {
    ll sum; int cnt; 
    Node(ll sum = 0, int cnt = 0) : 
        sum(sum), cnt(cnt) {} 
} t[N << 2]; 

Node merge(Node a, Node b) { 
    return Node(a.sum + b.sum, a.cnt + b.cnt); 
}

void update(int node, int l, int r, int i, int x) {
    if(l == r) { t[node] = Node(x, 1); return; }
    int m = l + r >> 1; 
    if(i <= m) update(node << 1, l, m, i, x); 
    else update(node << 1 | 1, m + 1, r, i, x); 
    t[node] = merge(t[node << 1], t[node << 1 | 1]); 
}

ll query(int node, int l, int r, int k) {
    if(l == r) return k ? t[node].sum : 0; 
    int m = l + r >> 1;
    if(t[node << 1].cnt >= k) return query(node << 1, l, m, k);
    else return query(node << 1 | 1, m + 1, r, k - t[node << 1].cnt) + t[node << 1].sum;
}

ll findMaxAttraction(int n, int start, int d, int a[]) {
    iota(p, p + n, 0);
    sort(p, p + n, [&](int i, int j) { return a[i] > a[j]; });
    for(int i = 0; i < n; ++i) pos[p[i]] = i;

    ll ans = 0; 
    for(int i = 0; i < n; ++i) {
        if(i > d) break; 
        update(1, 1, n, pos[i], a[i]); 
        ans = max(ans, query(1, 1, n, d - i)); 
    }
    return ans;
}

Compilation message (stderr)

holiday.cpp: In function 'void update(int, int, int, int, int)':
holiday.cpp:22:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int m = l + r >> 1; 
             ~~^~~
holiday.cpp: In function 'll query(int, int, int, int)':
holiday.cpp:30:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     int m = l + r >> 1;
             ~~^~~
grader.cpp: In function 'int main()':
grader.cpp:7:12: warning: variable 'n_s' set but not used [-Wunused-but-set-variable]
     int i, n_s;
            ^~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 23
• Subtask 3: 0 / 17
• Subtask 4: 0 / 53