Submission #77285

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
77285	2018-09-24 15:52:04	tmwilliamlin168	Pipes (BOI13_pipes)	C++14	100 / 100	116 ms	54500 KiB

pipes

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#include <bits/stdc++.h>
using namespace std;
//are lls needed?
#define ll long long
const int mxN=1e5;
int n, m, eu[mxN], ev[mxN], d[mxN], qu[mxN-1], qt, nx[mxN];
ll a[mxN], b[mxN];
vector<int> adj[mxN];
void fk() {
  cout << 0;
  exit(0);
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  
  cin >> n >> m;
  if(m>n)
    fk();
  for(int i=0; i<n; ++i)
    cin >> a[i];
  for(int i=0; i<m; ++i) {
    cin >> eu[i] >> ev[i], --eu[i], --ev[i];
    adj[eu[i]].push_back(i);
    adj[ev[i]].push_back(i);
 
 
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Compilation message (stderr)

pipes.cpp: In function 'int main()':
pipes.cpp:39:13: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
    if((n^qh)&1^1)
       ~~~~~~^~
pipes.cpp:56:17: warning: unused variable 'w' [-Wunused-variable]
    for(int v=u, w; nx[v]!=l; v^=eu[nx[v]]^ev[nx[v]])
                 ^
pipes.cpp:44:27: warning: 'w' may be used uninitialized in this function [-Wmaybe-uninitialized]
    for(int v=u, w, s2=1; v!=u||l==-1; l=nx[v], v=w, s2=-s2) {
                          ~^~~

• Subtask 1: 30 / 30
• Subtask 2: 70 / 70