#include <stdio.h>
 
int score_list[100];
int size = 0;
 
void record(int score) {
    if (size < 100) {
        score_list[size++] = score;
    } 
    else {
        fprintf(stderr, "Error\n");
    }
}
 
double average(void) {
    if (size == 0) return 0.0;
 
    int sum = 0;
    for (int i = 0; i < size; i++) {
        sum += score_list[i];
    }
    return (double)sum / size;
}
 
int main(void) {
    int i, score;
 
    for (i = 0; i < 5; i++) {
        scanf("%d", &score);
        printf("%d人目：%d点\n", i + 1, score);
        record(score);
    }
 
    printf("平均点：%lf点\n", average());
 
    return 0;
}
 

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