Submission #24386

#	Time	Username	Problem	Language	Result	Execution time	Memory
24386		gs14004	Roller Coaster Railroad (IOI16_railroad)	C++11	0 / 100	549 ms	27060 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pi;

map<int, int> mp;
long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
	vector<int> v;
	int n = (int) s.size();
	for(int i=0; i<n; i++){
		mp[s[i]]++;
		mp[t[i]]--;
	}
	for(auto &i : mp) v.push_back(i.second);
	int curBef = 1;
	for(int i=0; i<v.size(); i++){
		if(v[i] > 0){
			curBef -= v[i];
			if(curBef < 0) return 0;
		}
		curBef -= v[i];
	}
	return 0;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:16:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<v.size(); i++){
                ^

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