/** * @brief Codeforces Round #283 (Div. 2) a * @file a.cpp * @author mianma * @created 2014/12/18 17:45 * @edited 2014/12/18 17:45 * @type brute * @note */#include #include #include using namespace std;#define max(a, b) ((a) > (b) ? (a) : (b))#define min(a, b) ((a) > (b) ? (b) : (a)) #define abs(a) ((a) > 0 ? (a) : (0 - (a)))#define CLR(vec) memset(vec, 0, sizeof(vec))#ifdef DEBUGifstream in;ofstream out;#define CIN in#define COUT out#else#define CIN cin#define COUT cout#endif#define MAXN 105#define INF 1000100int n;int table[MAXN];int ans = INF;int main(void){ ios_base::sync_with_stdio(0);#ifdef DEBUG CIN.open("./in", ios::in); COUT.open("./out", ios::out);#endif CIN >> n; for(int i = 0; i < n; i++){ CIN >> table[i]; } for(int i = 1; i < n - 1; i++){ int tmp = -1; for(int j = 1; j < n; j++){ if(i == j) continue; else if(i + 1 == j) tmp = max( tmp, table[j] - table[j - 2] ); else tmp = max( tmp, table[j] - table[j - 1] ); } ans = min(tmp, ans); } COUT << ans << "\n"; return 0;}