mexc.cpp: In function 'int main()': mexc.cpp:17: warning: suggest parentheses around '+' inside '>>' mexc.cpp:13: warning: unused variable 'll' mexc.cpp:13: warning: unused variable 'j3' mexc.cpp:13: warning: unused variable 'gggg' mexc.cpp:13: warning: unused variable 'cc' mexc.cpp:14: warning: unused variable 'c' mexc.cpp:18: warning: unused variable 'cnt' mexc.cpp:13: warning: 'sf' may be used uninitialized in this function