View Compilation Error

0_0_24451098_28216.cpp: In function 'void solve(int)':
0_0_24451098_28216.cpp:31:27: error: invalid types 'int[int]' for array subscript
 int &co = cost[from][to][s];
                           ^
0_0_24451098_28216.cpp:48:39: error: 'co' was not declared in this scope
        cur[to]=min(cur[to],pre[from]+&co);
                                       ^