Compilare: main.cpp: In function 'void solve(int, int, bool, int)': main.cpp:13:11: warning: unused variable 'ans' [-Wunused-variable] int i,ans; ^~~ main.cpp: In function 'int main()': main.cpp:107:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("invsort.in", "r", stdin); ^ main.cpp:108:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("invsort.out", "w", stdout); ^ main.cpp:110:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:112:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^