#include<bits/stdc++.h> using namespace std; int main(){ int n,i=0,j=0; float sun=0,d=0,a[100][3]={0}; cin>>n; for(i=0;i<n;i++){ for(j=0;j<3;j++){ cin>>a[i][j]; } } for(i=0;i<n;i++){ sun=(a[i][0]+a[i][1])*a[i][2]/2; if(d<sun){ d=sun; } } printf("%.1f",d); } /************************************************************** Problem: 1330 User: panyuchen Language: C++ Result: Accepted Time:9 ms Memory:2072 kb ****************************************************************/