ural1010 Discrete Function

不难发现倾角最大的肯定是相邻两点。

#include <bits/stdc++.h>
using namespace std;

typedef long long LL;

const int N = 100005;
LL a[N];

int main() {
    int n; scanf("%d", &n);
    for (int i = 1; i <= n; i++) scanf("%lld", &a[i]);
    LL tmp = 0;
    int ans = 0;
    for (int i = 2; i <= n; i++) {
        if (abs(a[i] - a[i - 1]) > tmp) {
            tmp = abs(a[i] - a[i - 1]);
            ans = i;
        }
    }
    printf("%d %d\n", ans - 1, ans);
    return 0;
}