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#include<cmath> #include<queue> #include<utility> #include<algorithm> #include<sys/time.h> using namespace std; #define MAX 100000 bool compare(pair<int,int> p1,pair<int,int> p2) { if(p1.second < p2.second) return 1; else if(p1.second > p2.second) return 0; if(p1.first <= p2.first) return 1; else return 0; } int main() { int n = 35000; vector< pair<int,int> > p(n); for(int i=0;i<n;i++) { p[i] = make_pair(0,0); }; sort(p.begin(),p.begin()+n,compare); //for(int i=0;i<n;i++) //printf("%d %d\n",p[i].first,p[i].second); printf("%.6f\n",(p[n-1].second+p[n-2].second)/(20.0+p[n-1].first+p[n-2].first)); return 0; }
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