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View Compilation Error

0_0_20612305_14829.cpp:5:5: error: 'b' does not name a type
     b ? a:b )using namespace std;  struct ha{    int a, b;} s[1111]; int haha ( ha a, ha b ){    return a.b > b.b;} int main (){    int i, j, k;    int n, m, v;    int dp[1111];    while ( ~scanf ("%d %d", &n, &m) )    {        memset ( dp, 0, sizeof (dp));        for ( i=0 ; i<n ; i++ )            scanf ("%d", &s[i].a);        for ( i=0 ; i<n ; i++ )            scanf ("%d", &s[i].b);        sort (s, s+n, haha);        for ( i=0 ; i<n ; i++ )            for ( j=m ; j>0 ; j-- )                dp[j] = max (dp[j], dp[j-1]+s[i].a-(j-1)*s[i].b);        printf ("%d\n" ,dp[m]);    }}
     ^
0_0_20612305_14829.cpp: In function 'int main()':
0_0_20612305_14829.cpp:5:414: error: 'sort' was not declared in this scope
     b ? a:b )using namespace std;  struct ha{    int a, b;} s[1111]; int haha ( ha a, ha b ){    return a.b > b.b;} int main (){    int i, j, k;    int n, m, v;    int dp[1111];    while ( ~scanf ("%d %d", &n, &m) )    {        memset ( dp, 0, sizeof (dp));        for ( i=0 ; i<n ; i++ )            scanf ("%d", &s[i].a);        for ( i=0 ; i<n ; i++ )            scanf ("%d", &s[i].b);        sort (s, s+n, haha);        for ( i=0 ; i<n ; i++ )            for ( j=m ; j>0 ; j-- )                dp[j] = max (dp[j], dp[j-1]+s[i].a-(j-1)*s[i].b);        printf ("%d\n" ,dp[m]);    }}
                                                                                                                                                                                                                                                                                                                                                                                                                              ^
0_0_20612305_14829.cpp:5:414: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62:0,
                 from 0_0_20612305_14829.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4705:5: note:   'std::sort'
     sort(_RandomAccessIterator __first, _RandomAccessIterator __last,
     ^
0_0_20612305_14829.cpp:5:546: error: expected primary-expression before ';' token
     b ? a:b )using namespace std;  struct ha{    int a, b;} s[1111]; int haha ( ha a, ha b ){    return a.b > b.b;} int main (){    int i, j, k;    int n, m, v;    int dp[1111];    while ( ~scanf ("%d %d", &n, &m) )    {        memset ( dp, 0, sizeof (dp));        for ( i=0 ; i<n ; i++ )            scanf ("%d", &s[i].a);        for ( i=0 ; i<n ; i++ )            scanf ("%d", &s[i].b);        sort (s, s+n, haha);        for ( i=0 ; i<n ; i++ )            for ( j=m ; j>0 ; j-- )                dp[j] = max (dp[j], dp[j-1]+s[i].a-(j-1)*s[i].b);        printf ("%d\n" ,dp[m]);    }}
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  ^
0_0_20612305_14829.cpp:5:546: error: expected ')' before ';' token


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