#include<stdio.h>
#define NUM 10
int main(void)
{
int i;
int ma[NUM];
int mb[NUM];
int na=0;
int nb=0;
double AVE[NUM];
double a=0.0;
double b=0.0;
 
 
for(i=1 ; i<=10 ; i++){
printf("%d人目の数学:",i);
scanf("%d",&ma[i]);
 
printf("%d人目の英語:",i);
scanf("%d",&mb[i]);
 
if(ma[i] >= 0){
na=na+ma[i];
a=a+1.0;
} 
 
if(mb[i] >= 0){
nb=nb+mb[i];
b=b+1.0;
}
 
AVE[i]=(ma[i]+mb[i])/2.0;
}
 
for(i=1;i<=NUM;i++){
printf("%d番　数学:%d点, 英語:%d点",i,ma[i],mb[i]);
 
if(AVE[i]==-1.0)
printf(" 両方欠席\n");
else if(ma[i]==-1.0)
printf(" 片方欠席\n");
else if(mb[i]==-1.0)
printf(" 片方欠席\n");
else
printf("平均:%.1lf点\n",AVE[i]);
}
 
printf("合計（数学）:%d点, 合計（英語）:%d点\n",na,nb);
printf("平均（数学）:%.1lf点, 平均（英語）:%.1lf点\n",na/a,nb/b);
 
return(0);
}

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