0_0_10377235_20536.cpp: In function `int main()':
0_0_10377235_20536.cpp:10: error: `cin' undeclared (first use this function)
0_0_10377235_20536.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10377235_20536.cpp:12: error: `fu' undeclared (first use this function)
0_0_10377235_20536.cpp:12: error: expected `;' before "cin"
0_0_10377235_20536.cpp:13: error: expected `;' before '{' token
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