Compilare: user.cpp: In function ‘void uniform()’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp:50: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:88: warning: operation on ‘V’ may be undefined user.cpp:94: warning: operation on ‘V’ may be undefined user.cpp:96: warning: operation on ‘V’ may be undefined user.cpp:98: warning: operation on ‘V’ may be undefined user.cpp:100: warning: operation on ‘V’ may be undefined user.cpp: In function ‘int main()’: user.cpp:125: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result