CSP-201409-1-相鄰數對

解題代碼

#include <iostream>
#include <vector>
using namespace std;vector<int>arr;
int num;int main() {ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);int n;cin >> n;for (int i = 0; i < n; i++){int t;cin >> t;for (const auto& it : arr){if (abs(t - it) == 1){num++;}}arr.push_back(t);}cout << num;return 0;
}