View Compilation Error

0_0_12038268_19053.cpp: In function `int main()':
0_0_12038268_19053.cpp:19: error: `cin' undeclared (first use this function)
0_0_12038268_19053.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12038268_19053.cpp:43: error: `mp' undeclared (first use this function)
0_0_12038268_19053.cpp:48: error: expected `;' before '}' token