#include <stdio.h>
 
#define ROWS    3
#define COLS    5
 
int main(void)
{
    short vls[ROWS][COLS] = {0};
    short *ptr_vls = &vls[0][0];
 
    short x;
    for(int i = 0;i < ROWS * COLS && scanf("%hd", &x) == 1; ++i)
        *ptr_vls++ = x;
 
    double mean[ROWS] = {0.0};
 
    for(int i = 0; i < ROWS; ++i) {
        double var_mean = 0.0;
 
        for (int j = 0; j < COLS; ++j) {
            var_mean += (double) vls[i][j];        
        }
 
        mean[i] = var_mean / COLS;
    }
 
    for(int i = 0; i < ROWS; ++i) {
        printf("%.2f ", mean[i]);
    }
 
    return 0;
}
 

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