Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:26: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:30: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:36: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:36: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:37: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:37: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp: In function ‘void read()’: user.cpp:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:57: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:64: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:64: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result