Submission #291045

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
291045	2020-09-04 15:54:38	evpipis	Highway Tolls (IOI18_highway)	C++11	100 / 100	521 ms	14616 KiB

highway

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#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define mp make_pair
typedef pair<int, int> ii;
typedef long long ll;
const int len = 2e5+5;
ii edge[len];
int n, m, vis[len];
ll dis;
vector<ii> adj[len];
void find_bridge(int &x, int &y){
    int l = 0, r = m-1, ans;
    while (l <= r){
        int mid = (l+r)/2;
        vector<int> temp(m, 0);
        for (int j = 0; j <= mid; j++)
            temp[j] = 1;
        if (ask(temp) > dis)
            r = mid-1, ans = mid;
        else
            l = mid+1;
 
 
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Compilation message (stderr)

highway.cpp: In function 'void find_bridge(int&, int&)':
highway.cpp:6:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
    6 | #define se second
      |            ^~~~~~
highway.cpp:19:25: note: 'ans' was declared here
   19 |     int l = 0, r = m-1, ans;
      |                         ^~~
highway.cpp: In function 'void find_ans(std::vector<int>, std::vector<int>, int&, int&)':
highway.cpp:79:20: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   79 |     x = order_x[ans];
      |                    ^

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