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View Compilation Error

0_0_30605878_168\Main.java:1: 错误: 非法字符: '#'
#pragma warning(disable : 4786)
^
0_0_30605878_168\Main.java:1: 错误: 需要class, interface或enum
#pragma warning(disable : 4786)
        ^
0_0_30605878_168\Main.java:2: 错误: 非法字符: '#'
#include <set>
^
0_0_30605878_168\Main.java:3: 错误: 非法字符: '#'
#include <cstdio>
^
0_0_30605878_168\Main.java:6: 错误: 需要class, interface或enum
int main(void)
^
0_0_30605878_168\Main.java:9: 错误: 需要class, interface或enum
    set <int> s;
    ^
0_0_30605878_168\Main.java:10: 错误: 需要class, interface或enum
    set <int>::iterator it;
    ^
0_0_30605878_168\Main.java:12: 错误: 需要class, interface或enum
    while (scanf("%d%d", &n, &m), n + m)
    ^
0_0_30605878_168\Main.java:17: 错误: 需要class, interface或enum
            s.insert(t);
            ^
0_0_30605878_168\Main.java:18: 错误: 需要class, interface或enum
        }
        ^
0_0_30605878_168\Main.java:22: 错误: 需要class, interface或enum
            if (s.count(t)) s.erase(t);
            ^
0_0_30605878_168\Main.java:23: 错误: 需要class, interface或enum
        }
        ^
0_0_30605878_168\Main.java:24: 错误: 需要class, interface或enum
        for (it = s.begin(); it != s.end(); it++)
                             ^
0_0_30605878_168\Main.java:24: 错误: 需要class, interface或enum
        for (it = s.begin(); it != s.end(); it++)
                                            ^
0_0_30605878_168\Main.java:26: 错误: 需要class, interface或enum
        printf(s.size() ? "\n" : "NULL\n");
        ^
0_0_30605878_168\Main.java:27: 错误: 需要class, interface或enum
        s.clear();
        ^
0_0_30605878_168\Main.java:28: 错误: 需要class, interface或enum
    }
    ^
0_0_30605878_168\Main.java:31: 错误: 需要class, interface或enum
}
^
18 个错误


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