题目传送门
1 /*
2 分情况讨论，在long long范围里可以直接比较
3 sscanf 直接读到n中去
4 */
5 #include <cstdio>
6 #include <iostream>
7 #include <string>
8 #include <algorithm>
9 #include <cstring>
10 #include <map>
11 #include <set>
12 #include <vector>
13 using namespace std;
14
15 const int MAXN = 1e4 + 10;
16 const int INF = 0x3f3f3f3f;
17
18 int main(void) //ACdream 1202 Integer in C++
19 {
20 //freopen ("G.in", "r", stdin);
21
22 string s; string s_max = "9223372036854775807";
23 while (cin >> s)
24 {
25 long long n;
26 int len = s.size ();
27 if (s[0] != '-')
28 {
29 if (len < 19)
30 {
31 sscanf (s.c_str (), "%lld", &n);
32 if (n <= 32767) cout << "short" << endl;
33 else if (n <= 2147483647) cout << "int" << endl;
34 else cout << "long long" << endl;
35 }
36 else if (len == 19)
37 {
38 if (s > s_max) cout << "It is too big!" << endl;
39 else cout << "long long" << endl;
40 }
41 else cout << "It is too big!" << endl;
42 }
43 else
44 {
45 if (len < 20)
46 {
47 sscanf (s.c_str (), "%lld", &n);
48 if (n >= -32768) cout << "short" << endl;
49 else if (n >= 2147483647) cout << "int" << endl;
50 else cout << "long long" << endl;
51 }
52 else if (len == 20)
53 {
54 s.erase (s.begin ());
55 if (s < s_max) cout << "long long" << endl;
56 else cout << "It is too big!" << endl;
57 }
58 else cout << "It is too big!" << endl;
59 }
60 }
61
62 return 0;
63 }
64
65 /*
66 -32768 to 32767
67 -2147483648 to 2147483647
68 -9223372036854775808 to 9223372036854775807
69 short, int, long long
70 It is too big!
71 */
1 /*
2 for循环保存n
3 注意：2147483647 + 1 -> -2147483648，-2147483648 > 2147483647
4 在二进制中并不是数学的比大小
5 */
6 #include <cstdio>
7 #include <iostream>
8 #include <string>
9 #include <algorithm>
10 #include <cstring>
11 #include <map>
12 #include <set>
13 #include <vector>
14 using namespace std;
15
16 const int MAXN = 1e4 + 10;
17 const int INF = 0x3f3f3f3f;
18
19 int main(void) //ACdream 1202 Integer in C++
20 {
21 freopen ("G.in", "r", stdin);
22
23 string s;
24 char ss[33], ss_ll1[] = "9223372036854775808", ss_ll2[] = "9223372036854775807";
25
26 while (scanf ("%s", &ss) == 1)
27 {
28 int len = strlen (ss); long long n;
29 if (len > 20) puts ("It is too big!");
30 else if (ss[0] == '-')
31 {
32 if (len == 20)
33 {
34 if (strcmp (ss+1, ss_ll1) <= 0) puts ("long long");
35 else puts ("It is too big!");
36 }
37 else if (len < 20)
38 {
39 n = 0;
40 for (int i=1; i<len; ++i) n = n * 10 + (ss[i] - '0');
41 n = -n;
42 if (n >= -32768 && n <= 32767) puts ("short");
43 else if (n >= -2147483648 && n <= 2147483647) puts ("int");
44 else puts ("long long");
45 }
46 }
47 else if (len <= 19)
48 {
49 if (len == 19)
50 {
51 if (strcmp (ss, ss_ll2) <= 0) puts ("long long");
52 else puts ("It is too big!");
53 }
54 else
55 {
56 n = 0;
57 for (int i=0; i<len; ++i) n = n * 10 + (ss[i] - '0');
58 if (n >= -32768 && n <= 32767) puts ("short");
59 else if (n <= 2147483647 && n >= -2147483648) puts ("int");
60 else puts ("long long");
61 }
62 }
63 else puts ("It is too big!");
64 }
65
66 return 0;
67 }
68
69 /*
70 -32768 to 32767
71 -2147483648 to 2147483647
72 -9223372036854775808 to 9223372036854775807
73 short, int, long long
74 It is too big!
75 */