Submission #472104

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
472104	2021-09-13 02:29:59	Cross_Ratio	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	90 ms	17716 KiB

railroad

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
//#include "railroad.h"
using namespace std;
const int INF = 1e9;
struct SegTree {
    struct Node {
        int ma, sum;
        Node(int m1, int m2) : ma(m1), sum(m2) {}
        Node(int v) : ma(v), sum(v) {}
        Node() : ma(INF),sum(0) {}
    };
    vector<Node> seg;
    int MAX;
    SegTree(int N) {
        int i;
        for(i=1;2*i<N;i*=2) {}
        seg.resize(i);
        MAX = i;
    }
    Node f(Node x, Node y) {
        return Node(max(x.ma,y.ma),x.sum+y.sum);
    }
    void cons() {
        for(int i = MAX/2-1; i>0; i--) {
            seg[i] = f(seg[2*i],seg[2*i+1]);
        }
    }
    Node sum(int s, int e, int n, int ns, int ne) {
        if(e<=ns||ne<=s) return Node();
        if(s<=ns&&ne<=e) return seg[n];
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

railroad.cpp: In member function 'SegTree::Node SegTree::sum(int, int, int, int, int)':
railroad.cpp:31:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |         int mid = ns + ne >> 1;
      |                   ~~~^~~~
railroad.cpp: In member function 'int SegTree::FindLeft(int, int)':
railroad.cpp:60:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |         int mid = s + e >> 1;
      |                   ~~^~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36