Submission #429177

#	Time	Username	Problem	Language	Result	Execution time	Memory
429177		chirathnirodha	Finding Routers (IOI20_routers)	C++17	Compilation error	0 ms	0 KiB

routers

//Coded by Chirath Nirodha
#include<bits/stdc++.h>
using namespace std;
#include "routers.h"
#define MP make_pair
#define PB push_back
#define F first
#define S second
typedef long long ll;

vector<int> find_routers(int l, int n, int q) {
    vector<int> ans;
    if(n==2){
      ll p=0,q=l;
      while(q-p>1){
        ll m=(p+q)/2;
        int idx=use_detector(m);
        if(idx==0)p=m;
        else q=m;
      }
      ans.PB(0);
      ans.PB(2*a);
    }
    else{
      int cur=1;
      ans.PB(0);
      for(int i=1;i<=l;i++){
        int idx=use_detector(i);
        if(idx==cur){
          ans.PB(ans[ans.size()-1]+(i-1-ans[ans.size()-1])*2);
          cur++;
        }
        if(ans.size()==n)break;
      }
    }
	}
	return ans;
}

Compilation message (stderr)

routers.cpp: In function 'std::vector<int> find_routers(int, int, int)':
routers.cpp:22:16: error: 'a' was not declared in this scope
   22 |       ans.PB(2*a);
      |                ^
routers.cpp:33:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   33 |         if(ans.size()==n)break;
      |            ~~~~~~~~~~^~~
routers.cpp:36:2: warning: no return statement in function returning non-void [-Wreturn-type]
   36 |  }
      |  ^
routers.cpp: At global scope:
routers.cpp:37:2: error: expected unqualified-id before 'return'
   37 |  return ans;
      |  ^~~~~~
routers.cpp:38:1: error: expected declaration before '}' token
   38 | }
      | ^