[PA2014]Bohater
题目大意:
有\(n(n\le10^5)\)只怪物,你的血量为\(z\)。要打败第\(i\)只怪物时,你需要先消耗\(d_i\)点生命值,再恢复\(a_i\)点生命值。求一种打怪顺序,使得任意时刻\(x\ge0\)。
思路:
先打能加血的怪,将\(d_i\)从小到大排序后贪心;后打会扣血的怪,将\(a_i\)从大到小排序后贪心。
源代码:
#include<set>
#include<cstdio>
#include<cctype>
inline int getint() {
register char ch;
while(!isdigit(ch=getchar()));
register int x=ch^'0';
while(isdigit(ch=getchar())) x=(((x<<2)+x)<<1)+(ch^'0');
return x;
}
typedef long long int64;
const int N=1e5+1;
std::set<std::pair<int,int> > set;
int d[N],a[N],ans[N];
int main() {
const int n=getint();
int64 z=getint();
for(register int i=1;i<=n;i++) {
d[i]=getint();
a[i]=getint();
if(d[i]<a[i]) {
set.insert(std::make_pair(d[i],i));
}
}
while(!set.empty()) {
if(z<=set.begin()->first) {
puts("NIE");
return 0;
}
const int id=set.begin()->second;
z+=a[id]-d[id];
ans[++ans[0]]=id;
set.erase(set.begin());
}
for(register int i=1;i<=n;i++) {
if(d[i]>=a[i]) {
set.insert(std::make_pair(a[i],i));
}
}
while(!set.empty()) {
if(z<=d[set.rbegin()->second]) {
puts("NIE");
return 0;
}
const int id=set.rbegin()->second;
z+=a[id]-d[id];
ans[++ans[0]]=id;
set.erase(--set.end());
}
puts("TAK");
for(register int i=1;i<=n;i++) {
printf("%d%c",ans[i]," \n"[i==n]);
}
return 0;
}