0_0_7666024_10286.cpp: In function `long long int chg(int)':
0_0_7666024_10286.cpp:20: error: `i' does not name a type
0_0_7666024_10286.cpp:22: error: expected `;' before "for"
0_0_7666024_10286.cpp:22: error: `i' undeclared (first use this function)
0_0_7666024_10286.cpp:22: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7666024_10286.cpp:22: error: expected `;' before ')' token
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