View Compilation Error

0_0_18476239_1498.cpp:29:4: error: stray '\' in program
    for(int j=i;j<(i\n+1)*n;j++){   //单行往右扩展
    ^
0_0_18476239_1498.cpp:34:4: error: stray '\' in program
    for(int j=i-1;j>=(i\n)*n;j--){  //单行往左扩展
    ^
0_0_18476239_1498.cpp: In function 'int bfs()':
0_0_18476239_1498.cpp:29:21: error: expected ')' before 'n'
    for(int j=i;j<(i\n+1)*n;j++){   //单行往右扩展
                     ^
0_0_18476239_1498.cpp:34:24: error: expected ')' before 'n'
    for(int j=i-1;j>=(i\n)*n;j--){  //单行往左扩展
                        ^