#include <stdio.h>
//関数のプロトタイプ宣言
//ここ↓を埋めてね１
int max(int w, int x, int y, int z);
 
//main関数
int main(void) {
    int a,b,c,d;
//ここ↓を埋めてね２
	a=1;
	b=5;
	c=7;
	d=4;
	max(a,b,c,d);
	printf("%d\n",max(a,b,c,d));
	return 0;
}
 
//max関数の定義
int max(int w, int x, int y, int z){
//ここ↓を埋めてね３
	int m=w;
	if(m<x){
		m=x;
	}
	if(m<y){
		m=y;
	}
	if(m<z){
		m=z;
	}
	return m;
}
 

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