Submission #165435

#	Time	Username	Problem	Language	Result	Execution time	Memory
165435		Segtree	Roller Coaster Railroad (IOI16_railroad)	C++14	Compilation error	0 ms	0 KiB

railroad

#include<iostream>
#include<algorithm>
#include<vector>
#include"railroad.h"
using namespace std;
typedef long long ll;
ll plan_roller_coaster(int n,vector<int> s,vector<int> t){
    vector<pair<ll,ll> >v;
    for(int i=0;i<n;i++){
	v.push_back(make_pair(s[i],+1));
	v.push_back(make_pair(t[i],-1));
    }
    sort(v.begin(),v.end());
    ll cnt=0;
    for(int i=0;i<v.size();i++){
	cnt+=v[i].second;
	if(cnt>1)return 0;
    }
    return 1;
}

Compilation message (stderr)

railroad.cpp: In function 'll plan_roller_coaster(int, std::vector<int>, std::vector<int>)':
railroad.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++){
                 ~^~~~~~~~~
/tmp/ccVtwXup.o: In function `main':
grader.cpp:(.text.startup+0xe3): undefined reference to `plan_roller_coaster(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status