肘击造数据的人
测试点#1
输入：196092
输出：2045284649
AC代码：

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
using namespace std;
const int maxn = 1e6+9;
int a[maxn] = {0, 1, 2, 3, 4, 5, 6};
int main(){
	int n;
	cin >> n;
	for(int i = 6; i <= n; i++){
		a[i] = a[i - 1] + i - 5;
	}cout << a[n];
	
return 0;
}

WA代码：

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#define int long long
using namespace std;
const int maxn = 1e6+9;
int a[maxn] = {0, 1, 2, 3, 4, 5, 6};
signed main(){
	int n;
	cin >> n;
	for(int i = 6; i <= n; i++){
		a[i] = a[i - 1] + i - 5;
	}cout << a[n];
	
 return 0;
}

没错，只是因为开了long long，然后就错误了
这就说明输出爆int了
求改！！！