Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:23: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:23: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:27: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:27: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:31: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:32: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:33: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:33: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:34: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:34: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp: In function ‘void read()’: user.cpp:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:61: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:61: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result