Compilare: main.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization ("O3") main.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas] #pragma GCC optimization ("unroll-loops") main.cpp: In function 'int main()': main.cpp:37:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sms.in", "r", stdin); ^ main.cpp:38:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sms.out", "w", stdout); ^ main.cpp:50:64: warning: array subscript is below array bounds [-Warray-bounds] f[i] = (1.0 + p[s[i]-'a'][1] + p[s[i]-'a'][2]*f[i-1]); ~~~~~^