Compilare: user.cpp: In function ‘void read()’: user.cpp:14: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:40: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:40: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:45: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:45: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:50: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:50: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:55: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:55: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:60: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:60: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:65: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp:65: warning: suggest parentheses around comparison in operand of ‘^’ user.cpp: In function ‘int main()’: user.cpp:80: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result