#include<iostream>
using namespace std;
int main(){
	int n,a,b,c,d,e;
	cin>>n>>a>>b>>c>>d>>e;
	cout<<n-a-b-c-d-e;
}

这你都要看题解？？？

#include<iostream>//cin cout
#include<iomanip>//setprecision setw
#include<stdio.h>//scanf printf
#include<math.h>//ceil floor fabs sqrt round pow
#include<string>//string
#include<string.h>//memset
#include<sstream>//stringsream
#include<algorithm>//min max
using namespace std;
typedef long long ll;
int main(){
	int n,a,b,c,d,e;
	cin>>n>>a>>b>>c>>d>>e;
	cout<<n-a-b-c-d-e;
	return 0;
}