Submission #116166

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
116166	2019-06-11 04:09:31	RezwanArefin01	Highway Tolls (IOI18_highway)	C++17	100 / 100	366 ms	9820 KiB

highway

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>
using namespace std;
#include "highway.h"
typedef long long ll; 
const int MX = 9e4 + 5; 
vector<int> adj[MX], q, t[2];
int d[MX]; 
bool vis[MX]; 
void find_pair(int n, vector<int> l, vector<int> r, int a, int b) {
    int m = l.size(); 
    for(int i = 0; i < m; ++i) {
        adj[l[i]].push_back(i);
        adj[r[i]].push_back(i);
    }
    q = vector<int> (m, 0);
    ll base = ask(q); 
    int lo = 0, hi = m - 1, e;
    while(lo <= hi) {
        int mid = lo + hi >> 1; 
        for(int i = 0; i < m; ++i) 
            q[i] = i <= mid;
        if(ask(q) != base) 
            e = mid, hi = mid - 1; 
        else lo = mid + 1; 
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:25:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = lo + hi >> 1; 
                   ~~~^~~~
highway.cpp:59:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
             int mid = lo + hi >> 1; 
                       ~~~^~~~
highway.cpp:33:16: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int x = l[e], y = r[e]; 
                ^

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 6 / 6
• Subtask 4: 33 / 33
• Subtask 5: 18 / 18
• Subtask 6: 31 / 31