Submission #294266

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
294266	2020-09-08 18:32:47	dCoding	Torrent (COI16_torrent)	C++14	0 / 100	611 ms	19448 KiB

torrent

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#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
const int MAXN = 3e5+5;
vector<pair<int,int>> path, temp;
vector<int> adj[MAXN];
int n,a,b;
pair<int,int> curEdge;
void dfs(int node, int p) {
  if(!path.empty()) return;
  if(node == b) {
    path = temp;
    return;
  }
  
  for(auto& u:adj[node]) {
    if(u == p) continue;
    temp.push_back({u,node});
    dfs(u,node);
    temp.pop_back();
  }
}
int dfs1(int node, int p) {
  int res = 0;
 
 
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Compilation message (stderr)

torrent.cpp: In function 'int dfs1(int, int)':
torrent.cpp:37:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for(int i=0;i<c.size();i++) res = max(res, c[i]+i+1);
      |              ~^~~~~~~~~
torrent.cpp: In function 'int main()':
torrent.cpp:56:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   56 |   mid = lo+hi>>1;
      |         ~~^~~
torrent.cpp:69:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |  if(testIdx >= 0 && testIdx < path.size()) {
      |                     ~~~~~~~~^~~~~~~~~~~~~
torrent.cpp:74:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |  if(testIdx >= 0 && testIdx < path.size()) {
      |                     ~~~~~~~~^~~~~~~~~~~~~
torrent.cpp:79:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |  if(testIdx >= 0 && testIdx < path.size()) {
      |                     ~~~~~~~~^~~~~~~~~~~~~
torrent.cpp:42:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |  scanf("%d%d%d", &n, &a, &b);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
torrent.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |   scanf("%d%d", &u,&v);
      |   ~~~~~^~~~~~~~~~~~~~~
torrent.cpp:80:21: warning: 'mid' may be used uninitialized in this function [-Wmaybe-uninitialized]
   80 |   curEdge = path[mid];
      |                     ^

• Subtask 1: 0 / 31
• Subtask 2: 0 / 69