Compilare: user.cpp: In function ‘int main()’: user.cpp:10:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ssm.in","r",stdin); ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ssm.out","w",stdout); ^ user.cpp:27:51: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << bestSum << " " << first << " " << last; ^ user.cpp:27:31: warning: ‘first’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << bestSum << " " << first << " " << last; ^ user.cpp:23:61: warning: ‘idx’ may be used uninitialized in this function [-Wmaybe-uninitialized] bestSum = x[i] - mini, first = idx + 1, last = i; ^