USACO MilkingCowソース
3076 ワード
/*
ID: bbsunch2
PROG: milk2
LANG: C++
*/
#include <iostream>
#include <fstream>
#include <string>
#include <map>
using namespace std;
int main() {
ofstream fout ("milk2.out");
ifstream fin ("milk2.in");
map<int, int> startPoint_endPoint;
int pairNum = 0;
fin >> pairNum;
for(int i = 0; i < pairNum; i++)
{
int startPoint;
int endPoint;
fin >> startPoint >> endPoint;
startPoint_endPoint.insert(pair<int, int>(startPoint, endPoint));
}
//cout << startPoint_endPoint.size() << endl;
map<int,int>::iterator it;
int formerStart = 0;
int formerEnd = 0;
int currentStart = 0;
int currentEnd = 0;
bool firstLine = true;
for(it = startPoint_endPoint.begin(); it!=startPoint_endPoint.end(); it++)
{
if(firstLine)
{
firstLine = false;
formerStart = it->first;
formerEnd = it->second;
continue;
}
currentStart = it->first;
currentEnd = it->second;
if(currentStart <= formerEnd)
{
startPoint_endPoint.erase(formerStart);
startPoint_endPoint.erase(currentStart);
int toInsertEnd = currentEnd;
if(toInsertEnd < formerEnd)
{
toInsertEnd = formerEnd;
}
formerEnd = toInsertEnd;
startPoint_endPoint.insert(pair<int, int>(formerStart,toInsertEnd));
}else
{
formerStart = currentStart;
formerEnd = currentEnd;
}
}
formerEnd = 0;
firstLine = true;
int maxBusy = 0;
int maxLeisure = 0;
for(it = startPoint_endPoint.begin(); it!=startPoint_endPoint.end(); it++)
{
//cout << it->first << " " << it->second << endl;
if(firstLine)
{
firstLine = false;
formerEnd = it->second;
maxBusy = it->second - it->first;
continue;
}
int currentBusy = it->second - it->first;
if(maxBusy < currentBusy)
{
maxBusy = currentBusy;
}
int currentLeisure = it->first - formerEnd;
if(maxLeisure < currentLeisure)
{
maxLeisure = currentLeisure;
}
formerEnd = it->second;
}
fout << maxBusy << " " << maxLeisure << endl;
return 0;
}