View Compilation Error

193932_0_5351.cpp: In function `int main(int, char**)':
193932_0_5351.cpp:29: error: `vector' undeclared (first use this function)
193932_0_5351.cpp:29: error: (Each undeclared identifier is reported only once for each function it appears in.)
193932_0_5351.cpp:29: error: expected primary-expression before "int"
193932_0_5351.cpp:29: error: expected `;' before "int"
193932_0_5351.cpp:31: error: `b' undeclared (first use this function)