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View Compilation Error

0_0_15553270_49\Main.java:1: 错误: 非法字符: '#'
#include <iostream>
^
0_0_15553270_49\Main.java:1: 错误: 需要class, interface或enum
#include <iostream>
         ^
0_0_15553270_49\Main.java:2: 错误: 非法字符: '#'
#include <cstdio>
^
0_0_15553270_49\Main.java:3: 错误: 非法字符: '#'
#include <set>
^
0_0_15553270_49\Main.java:4: 错误: 非法字符: '#'
#include <cmath>
^
0_0_15553270_49\Main.java:6: 错误: 需要class, interface或enum
struct node
^
0_0_15553270_49\Main.java:9: 错误: 需要class, interface或enum
    friend bool operator <(node a,node b)//按lv从小到大排序 
    ^
0_0_15553270_49\Main.java:12: 错误: 需要class, interface或enum
    }
    ^
0_0_15553270_49\Main.java:14: 错误: 需要class, interface或enum
int main()
^
0_0_15553270_49\Main.java:17: 错误: 需要class, interface或enum
    set <node> S ;
    ^
0_0_15553270_49\Main.java:18: 错误: 需要class, interface或enum
    while(~scanf("%d",&n),n)
    ^
0_0_15553270_49\Main.java:21: 错误: 需要class, interface或enum
        node ma ;
        ^
0_0_15553270_49\Main.java:22: 错误: 需要class, interface或enum
        ma.id=1 ;ma.lv= 1000000000 ;
        ^
0_0_15553270_49\Main.java:22: 错误: 需要class, interface或enum
        ma.id=1 ;ma.lv= 1000000000 ;
                 ^
0_0_15553270_49\Main.java:23: 错误: 需要class, interface或enum
        S.insert(ma) ;
        ^
0_0_15553270_49\Main.java:24: 错误: 需要class, interface或enum
        while(n--)
        ^
0_0_15553270_49\Main.java:27: 错误: 需要class, interface或enum
            set <node>::iterator it,it1 ;
            ^
0_0_15553270_49\Main.java:28: 错误: 需要class, interface或enum
            it=S.lower_bound(ma) ;
            ^
0_0_15553270_49\Main.java:29: 错误: 需要class, interface或enum
            if(it==S.begin())
            ^
0_0_15553270_49\Main.java:32: 错误: 需要class, interface或enum
            }
            ^
0_0_15553270_49\Main.java:36: 错误: 需要class, interface或enum
                it-- ;
                ^
0_0_15553270_49\Main.java:37: 错误: 需要class, interface或enum
                if(fabs(it1->lv-ma.lv)>fabs(it->lv-ma.lv))
                ^
0_0_15553270_49\Main.java:40: 错误: 需要class, interface或enum
                }
                ^
0_0_15553270_49\Main.java:44: 错误: 需要class, interface或enum
                }
                ^
0_0_15553270_49\Main.java:47: 错误: 需要class, interface或enum
        }
        ^
0_0_15553270_49\Main.java:50: 错误: 需要class, interface或enum
}
^
26 个错误


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