【相邻数对】暴力遍历

暴力，没什么好说的：

#include<iostream>
#include<vector>
using namespace std;
int n;int main(){cin >> n;vector<int> num(n+3);for(int i = 0; i < n; i++){cin >> num[i];}int res = 0;for(int i = 0; i < n;i++){for(int j = i+1;j < n;j++){if(abs(num[i] - num[j]) == 1){res++;}}}cout << res;
}