View Compilation Error

0_0_37022469_6928.cpp: In function 'void solve()':
0_0_37022469_6928.cpp:33:9: error: expected ',' or ';' before 'vector'
         vector<double> row_mean(N);
         ^
0_0_37022469_6928.cpp:38:17: error: 'row_mean' was not declared in this scope
                 row_mean[r] += A[r][c];
                 ^
0_0_37022469_6928.cpp:44:13: error: 'row_mean' was not declared in this scope
             row_mean[i] /= M;
             ^