View Compilation Error

0_0_30803078_9517.cpp:8:53: error: conflicting declaration 'int S'
 int n, m, q, a[N], d[N], ee[N][3], big[N], bigp[N], S; ll f[N][2], g[3]; 
                                                     ^
0_0_30803078_9517.cpp:7:25: note: previous declaration as 'const int S'
 const int N = 1e5 + 10, S = 450;
                         ^