Submission #1029527

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029527		nisanduu	Detecting Molecules (IOI16_molecules)	C++14	Compilation error	0 ms	0 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
std::vector<int> find_subset(int l, int u, std::vector<long long> w) {
    vector<ll> pref;
    int n = w.size();
    for(ll i=0;i<n;i++){
        pref.push_back(w[i]);
    }
    vector<int> ans;
    for(ll i=1;i<w.size();i++){
        pref[i]=pref[i-1]+pref[i];
    }
    for(ll i=0;i<w.size();i++){
        ll target = i != 0 ? pref[i-1] : 0;
        target += l;
        ll ub = (target-l) + u;
        ll left = i,right = n-1;
        ll ind = i;
        while(left<=right){
            ll mid = left + (right-left)/2;
            if(pref[mid]<target){
                left = mid+1;
            }else if(pref[mid]>ub){
                right = mid-1;
            }else{
                ind = mid;
                right = mid-1;
            }
        }
        if(pref[ind]>=target&&pref[ind]<=ub){
            for(ll j=i;j<=ind;j++){
                ans.push_back(j);
            }
            return ans;
        }
    }
    return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<long long int>)':
molecules.cpp:12:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(ll i=1;i<w.size();i++){
      |                ~^~~~~~~~~
molecules.cpp:15:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(ll i=0;i<w.size();i++){
      |                ~^~~~~~~~~
/usr/bin/ld: /tmp/cc9JKQ3I.o: in function `main':
grader.cpp:(.text.startup+0x18d): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status