HDU 4585 Shaolin (STL)
没想到map还有排序功能,默认按照键值从小到大排序
#include <cstdio>
#include <iostream>
#include <cstring>
#include <cmath>
#include <map>
#include <algorithm>
#include <cstdlib>
using namespace std; int main() {
int n;
int id,g;
while(scanf("%d",&n) && n) {
map<int,int>m;
m[1000000000] = 1;
for(int i=1; i<=n; ++i) {
scanf("%d%d",&id,&g);
printf("%d ",id);
map<int,int> ::iterator it;
it = m.lower_bound(g); // 二分找第一个大于等于g的位置,如果没有,则返回末尾位置
if(it == m.end()) {
it -- ;
printf("%d\n",it->second);
} else {
if(it == m.begin()) {
printf("%d\n",it->second);
} else {
int pos = it->first;
int tmp = it->second;
it --;
printf("%d\n",(pos - g) < (g - it->first) ? tmp : it->second);
}
}
m[g] = id;
}
}
return 0;
}
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