View Compilation Error

0_0_12651548_7268.cpp: In function `void solve()':
0_0_12651548_7268.cpp:236: error: `fread_unlocked' undeclared (first use this function)
0_0_12651548_7268.cpp:236: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12651548_7268.cpp:263: error: `fwrite_unlocked' undeclared (first use this function)
0_0_12651548_7268.cpp: In function `int main()':
0_0_12651548_7268.cpp:272: error: `fread_unlocked' undeclared (first use this function)
0_0_12651548_7268.cpp:275: error: `fwrite_unlocked' undeclared (first use this function)