Compilare: user.cpp: In function ‘int main()’: user.cpp:38:58: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if (cr[i] == 0) cr[i] = i, coef1[i] = (rand () << 15 + rand ()) % mod1, coef2[i] = (rand () << 15 + rand ()) % mod2, coef3[i] = (rand () << 15 + rand ()) % mod3, coef4[i] = (rand () << 15 + rand ()) % mod4; ^ user.cpp:38:103: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if (cr[i] == 0) cr[i] = i, coef1[i] = (rand () << 15 + rand ()) % mod1, coef2[i] = (rand () << 15 + rand ()) % mod2, coef3[i] = (rand () << 15 + rand ()) % mod3, coef4[i] = (rand () << 15 + rand ()) % mod4; ^ user.cpp:38:148: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if (cr[i] == 0) cr[i] = i, coef1[i] = (rand () << 15 + rand ()) % mod1, coef2[i] = (rand () << 15 + rand ()) % mod2, coef3[i] = (rand () << 15 + rand ()) % mod3, coef4[i] = (rand () << 15 + rand ()) % mod4; ^ user.cpp:38:193: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if (cr[i] == 0) cr[i] = i, coef1[i] = (rand () << 15 + rand ()) % mod1, coef2[i] = (rand () << 15 + rand ()) % mod2, coef3[i] = (rand () << 15 + rand ()) % mod3, coef4[i] = (rand () << 15 + rand ()) % mod4; ^ user.cpp:22:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("shukarime.in", "r", stdin); ^ user.cpp:23:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("shukarime.out", "w", stdout); ^ user.cpp: In function ‘void Next()’: user.cpp:91:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (sir, 1, maxl, stdin), pos = 0; ^