Compilare: user.cpp: In function ‘void sol()’: user.cpp:11:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:27:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^ user.cpp: In function ‘int main()’: user.cpp:90:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minmaxstore.in", "r", stdin); ^ user.cpp:91:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minmaxstore.out", "w", stdout); ^ user.cpp: In function ‘void sol()’: user.cpp:75:5: warning: ‘e1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(e1 == p1) { ^ user.cpp:82:9: warning: ‘e2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(e2 == p2) ^