计算:1+2+3+.....n+1*1+2*2+..m*m+1/1+1/2+...1/k

/*
计算:1+2+3+.....n+1*1+2*2+..m*m+1/1+1/2+...1/k; 
*/
#include <stdio.h>
double add(int n){
    double s1=0.0;
    for(int i=1;i<=n;i++){
        s1+=i;
    }
    return s1;
}
double chen(int m){
    double s2=0.0;
    for(int i=i;i<=m;i++){
        s2+=i*i;
    }
    return s2;
}
double chu(int k){
    double s3=0.0;
    for(int i=0;i<=k;i++){
        s3+=1.0/i;
    }
    return s3;
} 
int main(){
     int n,m,k;
     double s1,s2,s3,s4;
     scanf("%d%d%d",&n,&m,&k);
     s1=add(n);
     s2=chen(m);
     s3=chu(k);
     s4=s1+s2+s3;
     printf("%lf  %lf  %lf   %lf
",s4,s1,s2,s3);
     return 0;
}

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