Compilare: main.cpp: In function 'bool check(int)': main.cpp:33:13: warning: variable 'a' set but not used [-Wunused-but-set-variable] int a; ^ main.cpp: In function 'void Solve()': main.cpp:46:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ main.cpp:50:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", S + 1); ^ main.cpp: In function 'int main()': main.cpp:70:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("largestroot.in", "r", stdin); ^ main.cpp:72:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^