#include <iostream> using namespace std; int a,b,c; int main(){ cin>>a>>b>>c; cout<<a0.2+b0.3+c*0.5; } 别忘记点赞

#include <iostream> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; cout<<a0.2+b0.3+c*0.5; return 0; }

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