Submission #73141

#	Time	Username	Problem	Language	Result	Execution time	Memory
73141		Kmcode	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	568 ms	28580 KiB

railroad

#include<bits/stdc++.h>
using namespace std;

//#include "railroad.h"

map<int,long long int> mp;


long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
	t.push_back(-1);
	s.push_back(INT_MAX-3);
    for(int i=0;i<s.size();i++){
		mp[s[i]]++;
		mp[t[i]]--;
	}
	long long int sum=0;
	for(auto it:mp){
		long long int add=sum;
		sum-=it.second;
		it.second+=add;
		it.second-=sum;
		if(it.second<0){
			return 1;
		}
	}
	for(auto it:mp){
		if(it.second&1){
			return 1;
		}
	}
    return 0;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<s.size();i++){
                 ~^~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36