Compilare: user.cpp: In function ‘void solve()’: user.cpp:55: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.cpp: In function ‘void repeta()’: user.cpp:79: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.cpp: In function ‘int main()’: user.cpp:85: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result