Compilare: user.cpp: In function ‘int main()’: user.cpp:86:58: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] ans += (sg[k][j] ^ sg[i - k][j] ^ big_sg == sg[i][j]); ^ user.cpp:90:58: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] ans += (sg[i][k] ^ sg[i][j - k] ^ big_sg == sg[i][j]); ^ user.cpp:94:62: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] ans += (sg[k - 1][j] ^ sg[i - k][j] ^ big_sg == sg[i][j]); ^ user.cpp:97:62: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] ans += (sg[i][k - 1] ^ sg[i][j - k] ^ big_sg == sg[i][j]); ^ user.cpp:101:51: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] ans += (sg[i - 2][j - 2] ^ big_sg == sg[i][j]); ^ user.cpp:29:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc2.in","r",stdin); ^ user.cpp:30:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc2.out","w",stdout); ^ user.cpp:66:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:68:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^