不正经题解

#include<bits/stdc++.h>
using namespace std;
#define onekun 1
#define nokun 0
#define ikun for
#define jj while
#define kunint int
#define kunll long long
#define kunfloat float
#define kundb double
#define kunchar char
#define kunstring string
#define ji main
#define kunin cin
#define kunout cout
#define jinitaimei return
#define kunprintf printf
#define kunscanf scanf
kunint ji(){
    kunint a,b,c;
    kunin>>a>>b>>c;
    kunout<<a*0.2+b*0.3+c*0.5;
    jinitaimei nokun;
}