View Compilation Error

0_0_25826912_19488.cpp: In function 'int dfs(int, int)':
0_0_25826912_19488.cpp:25:18: error: 'arr' was not declared in this scope
             tem+=arr[cur[i]][cur[i+1]];
                  ^
0_0_25826912_19488.cpp: In function 'int slove(int)':
0_0_25826912_19488.cpp:43:13: error: 'arr' was not declared in this scope
             arr[i][j] = bfs(g[i][0],g[i][1],g[j][0],g[j][1]);
             ^