Compilare: main.cpp: In function 'void sub(Mare&, Mare, int)': main.cpp:47:42: warning: suggest parentheses around '&&' within '||' [-Wparentheses] for (int i = 0, t = 0; i + N < A.lun && t || i < B.lun; ++i, t = (t < 0 ? 1 : 0)) ~~~~~~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:74:22: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] K.v[(lun - i << 2) - j] = (bit & bt[j]) != 0; ~~~~^~~ main.cpp:61:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fopen (FIN, "r"), "%s", S); ^ main.cpp:122:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen (FOU, "w", stdout); ^