View Compilation Error

0_0_20020128_5988.cpp:77:14: error: invalid character '\' in raw string delimiter
    printf(R"\n", ans);
           ^
0_0_20020128_5988.cpp:77:4: error: stray 'R' in program
    printf(R"\n", ans);
    ^
0_0_20020128_5988.cpp:85:15: error: invalid character '\' in raw string delimiter
     printf(R"\n", ans);
            ^
0_0_20020128_5988.cpp:85:5: error: stray 'R' in program
     printf(R"\n", ans);
     ^